NXP MPC8540 Reference guide

MPC8540 PowerQUICC III™

Integrated Host Processor

Reference Manual

MPC8540RM

Rev. 1

07/2004

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MPC8540RM

Rev. 1

07/2004

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I

III

8

9

10

11

12

13

14

15

16

17

1

2

3

4

IV

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19

20

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II

5

6

7

A

GLO

REG

IND

Part I—Overview

Overview

Memory Map

Signal Descriptions

Reset, Clocking, and Initialization

Part II—e500 Core Complex and L2 Cache

e500 Core Complex Overview

e500 Register Summary

L2 Look-Aside Cache/SRAM

Part III—Memory and I/O Interfaces

e500 Coherency Module

DDR Memory Controller

Programmable Interrupt Controller

I

2

C Interface

DUART

Local Bus Controller

Three-Speed Ethernet Controllers

DMA Controller

PCI/PCI-X Bus Interface

RapidIO Interface

Part IV—Global Functions and Debug

Global Utilities

Performance Monitor

Debug Features and Watchpoint Facility

10/100 Fast Ethernet Controller

Appendix A—Revision History

Glossary of Terms and Abbreviations

Register Index (Memory-Mapped Registers)

General Index

I

III

8

9

10

11

12

13

14

15

16

17

1

2

3

4

IV

18

19

20

21

II

5

6

7

A

GLO

REG

IND

Part I—Overview

Overview

Memory Map

Signal Descriptions

Reset, Clocking, and Initialization

Part II—e500 Core Complex and L2 Cache

e500 Core Complex Overview

e500 Register Summary

L2 Look-Aside Cache/SRAM

Part III—Memory and I/O Interfaces

e500 Coherency Module

DDR Memory Controller

Programmable Interrupt Controller

I

2

C Interface

DUART

Local Bus Controller

Three-Speed Ethernet Controllers

DMA Controller

PCI/PCI-X Bus Interface

RapidIO Interface

Part IV—Global Functions and Debug

Global Utilities

Performance Monitor

Debug Features and Watchpoint Facility

10/100 Fast Ethernet Controller

Appendix A—Revision History

Glossary of Terms and Abbreviations

Register Index (Memory-Mapped Registers)

General Index

MPC8540 PowerQUICC III Integrated Host Processor Reference Manual, Rev. 1

Freescale Semiconductor v

Contents

Paragraph

Number Title

Page

Number

Co nt ents

About This Book

Audience.....................................................................................................................lxxxiii

Organization................................................................................................................lxxxiii

Suggested Reading...................................................................................................... lxxxvi

General Information............................................................................................ lxxxvi

Related Documentation ...................................................................................... lxxxvi

Conventions ...............................................................................................................lxxxvii

Signal Conventions...................................................................................................lxxxviii

Acronyms and Abbreviations ...................................................................................lxxxviii

Part I

Overview

Chapter 1

Overview

1.1 Introduction...................................................................................................................... 1-1

1.2 MPC8540 Overview........................................................................................................ 1-1

1.2.1 Key Features ................................................................................................................1-2

1.3 MPC8540 Architecture Overview ...................................................................................1-8

1.3.1 e500 Core Overview.................................................................................................... 1-8

1.3.2 On-Chip Memory Unit............................................................................................... 1-12

1.3.2.1 On-Chip Memory as Memory-Mapped SRAM.....................................................1-13

1.3.2.2 On-Chip Memory as L2 Cache.............................................................................. 1-13

1.3.3 e500 Coherency Module (ECM)................................................................................ 1-14

1.3.4 DDR SDRAM Controller .......................................................................................... 1-14

1.3.5 Programmable Interrupt Controller (PIC).................................................................. 1-15

1.3.6 I

2

C Controller ............................................................................................................ 1-15

1.3.7 Boot Sequencer.......................................................................................................... 1-16

1.3.8 Dual Universal Asynchronous Receiver/Transmitter (DUART)...............................1-16

1.3.9 10/100 Fast Ethernet Controller.................................................................................1-16

1.3.10 Local Bus Controller (LBC)...................................................................................... 1-17

1.3.11 Three-Speed Ethernet Controllers (10/100/1Gb).......................................................1-17

1.3.12 Integrated DMA......................................................................................................... 1-18

1.3.13 PCI Controller............................................................................................................1-18

1.3.14 RapidIO Controller .................................................................................................... 1-18

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1.3.14.1 RapidIO Message Unit .......................................................................................... 1-19

1.3.15 Power Management ................................................................................................... 1-19

1.3.16 Clocking..................................................................................................................... 1-20

1.3.17 Address Map..............................................................................................................1-20

1.3.18 OCeaN Switch Fabric................................................................................................ 1-20

1.3.19 Processing Across the On-Chip Fabric...................................................................... 1-20

1.3.20 Data Processing with the e500 Coherency Module...................................................1-21

1.4 MPC8540 Application Examples .................................................................................. 1-21

1.4.1 MPC8540 Applications..............................................................................................1-21

Chapter 2

Memory Map

2.1 Local Memory Map Overview and Example .................................................................. 2-1

2.2 Address Translation and Mapping................................................................................... 2-3

2.2.1 SRAM Windows.......................................................................................................... 2-4

2.2.2 Window into Configuration Space...............................................................................2-4

2.2.3 Local Access Windows................................................................................................ 2-4

2.2.3.1 Local Access Register Memory Map ...................................................................... 2-5

2.2.3.2 Local Access Window n Base Address Registers

(LAWBAR0–LAWBAR7)................................................................................... 2-6

2.2.3.3 Local Access Window n Attributes Registers

(LAWAR0–LAWAR7)......................................................................................... 2-6

2.2.3.4 Precedence of Local Access Windows .................................................................... 2-7

2.2.3.5 Configuring Local Access Windows .......................................................................2-7

2.2.3.6 Distinguishing Local Access Windows from Other Mapping Functions................2-8

2.2.3.7 Illegal Interaction Between Local Access Windows and DDR

SDRAM Chip Selects.......................................................................................... 2-8

2.2.4 Outbound Address Translation and Mapping Windows..............................................2-8

2.2.5 Inbound Address Translation and Mapping Windows ................................................ 2-9

2.2.5.1 RapidIO Inbound ATMU.........................................................................................2-9

2.2.5.2 PCI/PCI-X Inbound ATMU.....................................................................................2-9

2.2.5.3 Illegal Interaction Between Inbound ATMUs and Local Access

Windows..............................................................................................................2-9

2.3 Configuration, Control, and Status Register Map..........................................................2-10

2.3.1 Accessing CCSR Memory from External Masters.................................................... 2-11

2.3.2 Organization of CCSR Memory ................................................................................ 2-11

2.3.3 General Utilities Registers......................................................................................... 2-13

2.3.4 Interrupt Controller and CCSR.................................................................................. 2-14

2.3.5 RapidIO and CCSR.................................................................................................... 2-15

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2.3.6 Device-Specific Utilities............................................................................................2-15

2.4 Complete CCSR Map .................................................................................................... 2-16

Chapter 3

Signal Descriptions

3.1 Signals Overview.............................................................................................................3-1

3.2 Configuration Signals Sampled at Reset ....................................................................... 3-15

3.3 Output Signal States During Reset ................................................................................ 3-16

Chapter 4

Reset, Clocking, and Initialization

4.1 Overview.......................................................................................................................... 4-1

4.2 External Signal Descriptions ........................................................................................... 4-1

4.2.1 System Control Signals................................................................................................ 4-2

4.2.2 Clock Signals............................................................................................................... 4-3

4.3 Memory Map/Register Definition ................................................................................... 4-3

4.3.1 Local Configuration Control........................................................................................ 4-3

4.3.1.1 Accessing Configuration, Control, and Status Registers.........................................4-4

4.3.1.1.1 Updating CCSRBAR........................................................................................... 4-4

4.3.1.1.2 Configuration, Control, and Status Base Address Register

(CCSRBAR).................................................................................................... 4-5

4.3.1.2 Accessing Alternate Configuration Space............................................................... 4-5

4.3.1.2.1 Alternate Configuration Base Address Register (ALTCBAR)............................ 4-6

4.3.1.2.2 Alternate Configuration Attribute Register (ALTCAR)...................................... 4-6

4.3.1.3 Boot Page Translation.............................................................................................. 4-7

4.3.1.3.1 Boot Page Translation Register (BPTR).............................................................. 4-8

4.3.2 Boot Sequencer............................................................................................................ 4-8

4.4 Functional Description..................................................................................................... 4-8

4.4.1 Reset Operations.......................................................................................................... 4-8

4.4.1.1 Soft Reset.................................................................................................................4-9

4.4.1.2 Hard Reset ...............................................................................................................4-9

4.4.2 Power-On Reset Sequence........................................................................................... 4-9

4.4.3 Power-On Reset Configuration.................................................................................. 4-11

4.4.3.1 System PLL Ratio.................................................................................................. 4-12

4.4.3.2 e500 Core PLL Ratio.............................................................................................4-13

4.4.3.3 Boot ROM Location .............................................................................................. 4-14

4.4.3.4 Host/Agent Configuration ..................................................................................... 4-14

4.4.3.5 CPU Boot Configuration ....................................................................................... 4-15

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4.4.3.6 Boot Sequencer Configuration .............................................................................. 4-16

4.4.3.7 TSEC Width........................................................................................................... 4-16

4.4.3.8 TSEC1 Protocol..................................................................................................... 4-17

4.4.3.9 TSEC2 Protocol..................................................................................................... 4-17

4.4.3.10 RapidIO Transmit Clock Source............................................................................ 4-18

4.4.3.11 RapidIO Device ID................................................................................................ 4-18

4.4.3.12 PCI Width Configuration....................................................................................... 4-19

4.4.3.13 PCI I/O Impedance ................................................................................................ 4-19

4.4.3.14 PCI Arbiter Configuration ..................................................................................... 4-19

4.4.3.15 PCI Debug Configuration......................................................................................4-20

4.4.3.16 PCI-X Configuration ............................................................................................. 4-20

4.4.3.17 Memory Debug Configuration ..............................................................................4-20

4.4.3.18 DDR Debug Configuration....................................................................................4-21

4.4.3.19 PCI/PCI-X Output Hold Configuration................................................................. 4-21

4.4.3.20 Local Bus Output Hold Configuration .................................................................. 4-22

4.4.3.21 General-Purpose POR Configuration.................................................................... 4-23

4.4.4 Clocking.....................................................................................................................4-23

4.4.4.1 System Clock/PCI Clock....................................................................................... 4-23

4.4.4.2 RapidIO Clocks ..................................................................................................... 4-24

4.4.4.3 Ethernet Clocks...................................................................................................... 4-25

4.4.4.4 Real Time Clock.................................................................................................... 4-25

Part II

e500 Core Complex and L2 Cache

Chapter 5

Core Complex Overview

5.1 Overview.......................................................................................................................... 5-1

5.1.1 Upward Compatibility ................................................................................................. 5-3

5.1.2 Core Complex Summary ............................................................................................. 5-3

5.2 e500 Processor and System Version Numbers................................................................. 5-4

5.3 Features............................................................................................................................ 5-5

5.4 Instruction Set................................................................................................................5-12

5.5 Instruction Flow.............................................................................................................5-14

5.5.1 Initial Instruction Fetch..............................................................................................5-14

5.5.2 Branch Detection and Prediction............................................................................... 5-14

5.5.3 e500 Execution Pipeline ............................................................................................ 5-15

5.6 Programming Model...................................................................................................... 5-18

5.7 On-Chip Cache Implementation .................................................................................... 5-20

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5.8 Interrupts and Exception Handling................................................................................ 5-20

5.8.1 Exception Handling ................................................................................................... 5-20

5.8.2 Interrupt Classes ........................................................................................................ 5-21

5.8.3 Interrupt Types........................................................................................................... 5-21

5.8.4 Upper Bound on Interrupt Latencies ......................................................................... 5-22

5.8.5 Interrupt Registers...................................................................................................... 5-22

5.9 Memory Management.................................................................................................... 5-24

5.9.1 Address Translation ................................................................................................... 5-26

5.9.2 MMU Assist Registers (MAS1–MAS4 and MAS6) ................................................. 5-27

5.9.3 Process ID Registers (PID0–PID2)............................................................................ 5-27

5.9.4 TLB Coherency.......................................................................................................... 5-27

5.10 Memory Coherency ....................................................................................................... 5-28

5.10.1 Atomic Update Memory References ......................................................................... 5-28

5.10.2 Memory Access Ordering.......................................................................................... 5-28

5.10.3 Cache Control Instructions ........................................................................................ 5-28

5.10.4 Programmable Page Characteristics .......................................................................... 5-29

5.11 Core Complex Bus (CCB) ............................................................................................. 5-29

5.12 Performance Monitoring................................................................................................ 5-29

5.12.1 Global Control Register............................................................................................. 5-30

5.12.2 Performance Monitor Counter Registers...................................................................5-30

5.12.3 Local Control Registers............................................................................................. 5-30

5.13 Legacy Support of PowerPC Architecture..................................................................... 5-31

5.13.1 Instruction Set Compatibility.....................................................................................5-31

5.13.1.1 User Instruction Set ............................................................................................... 5-31

5.13.1.2 Supervisor Instruction Set...................................................................................... 5-31

5.13.2 Memory Subsystem ................................................................................................... 5-32

5.13.3 Exception Handling ................................................................................................... 5-32

5.13.4 Memory Management................................................................................................ 5-32

5.13.5 Reset...........................................................................................................................5-32

5.13.6 Little-Endian Mode....................................................................................................5-33

5.14 PowerQUICC III Implementation Details..................................................................... 5-33

Chapter 6

Core Register Summary

6.1 Overview.......................................................................................................................... 6-1

6.1.1 Register Set..................................................................................................................6-1

6.2 Register Model for 32-Bit Implementations.................................................................... 6-3

6.2.1 Special-Purpose Registers (SPRs)............................................................................... 6-4

6.3 Registers for Computational Operations.......................................................................... 6-8

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6.3.1 General-Purpose Registers (GPRs).............................................................................. 6-8

6.3.2 Integer Exception Register (XER)............................................................................... 6-8

6.4 Registers for Branch Operations...................................................................................... 6-9

6.4.1 Condition Register (CR).............................................................................................. 6-9

6.4.2 Link Register (LR)..................................................................................................... 6-11

6.4.3 Count Register (CTR)................................................................................................ 6-11

6.5 Processor Control Registers........................................................................................... 6-11

6.5.1 Machine State Register (MSR).................................................................................. 6-12

6.5.2 Processor ID Register (PIR) ...................................................................................... 6-14

6.5.3 Processor Version Register (PVR)............................................................................. 6-14

6.5.4 System Version Register (SVR)................................................................................. 6-14

6.6 Timer Registers..............................................................................................................6-15

6.6.1 Timer Control Register (TCR)................................................................................... 6-15

6.6.2 Timer Status Register (TSR)...................................................................................... 6-16

6.6.3 Time Base Registers .................................................................................................. 6-17

6.6.4 Decrementer Register ................................................................................................ 6-17

6.6.5 Decrementer Auto-Reload Register (DECAR).......................................................... 6-17

6.7 Interrupt Registers..........................................................................................................6-18

6.7.1 Interrupt Registers Defined by Book E......................................................................6-18

6.7.1.1 Save/Restore Register 0 (SRR0)............................................................................ 6-18

6.7.1.2 Save/Restore Register 1 (SRR1)............................................................................ 6-18

6.7.1.3 Critical Save/Restore Register 0 (CSRR0)............................................................6-18

6.7.1.4 Critical Save/Restore Register 1 (CSRR1)............................................................6-19

6.7.1.5 Data Exception Address Register (DEAR)............................................................ 6-19

6.7.1.6 Interrupt Vector Prefix Register (IVPR)................................................................ 6-19

6.7.1.7 Interrupt Vector Offset Registers (IVORn)............................................................ 6-19

6.7.1.8 Exception Syndrome Register (ESR) ....................................................................6-20

6.7.2 EIS-Defined Interrupt Registers ................................................................................ 6-21

6.7.2.1 Machine Check Save/Restore Register 0 (MCSRR0) ...........................................6-21

6.7.2.2 Machine Check Save/Restore Register 1 (MCSRR1) ...........................................6-22

6.7.2.3 Machine Check Address Register (MCAR) .......................................................... 6-22

6.7.2.4 Machine Check Syndrome Register (MCSR)........................................................ 6-23

6.8 Software-Use SPRs (SPRG0–SPRG7 and USPRG0) ...................................................6-24

6.9 Branch Target Buffer (BTB) Registers.......................................................................... 6-25

6.9.1 Branch Buffer Entry Address Register (BBEAR).....................................................6-25

6.9.2 Branch Buffer Target Address Register (BBTAR).................................................... 6-25

6.9.3 Branch Unit Control and Status Register (BUCSR)..................................................6-26

6.10 Hardware Implementation-Dependent Registers........................................................... 6-27

6.10.1 Hardware Implementation-Dependent Register 0 (HID0).........................................6-27

6.10.2 Hardware Implementation-Dependent Register 1 (HID1).........................................6-28

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6.11 L1 Cache Configuration Registers................................................................................. 6-30

6.11.1 L1 Cache Control and Status Register 0 (L1CSR0) .................................................. 6-30

6.11.2 L1 Cache Control and Status Register 1 (L1CSR1) .................................................. 6-31

6.11.3 L1 Cache Configuration Register 0 (L1CFG0) .........................................................6-32

6.11.4 L1 Cache Configuration Register 1 (L1CFG1) .........................................................6-33

6.12 MMU Registers..............................................................................................................6-34

6.12.1 Process ID Registers (PID0–PID2)............................................................................ 6-34

6.12.2 MMU Control and Status Register 0 (MMUCSR0)..................................................6-34

6.12.3 MMU Configuration Register (MMUCFG) .............................................................. 6-35

6.12.4 TLB Configuration Registers (TLBnCFG)................................................................ 6-35

6.12.4.1 TLB0 Configuration Register 0 (TLB0CFG)........................................................6-35

6.12.4.2 TLB1 Configuration Register 1 (TLB1CFG)........................................................6-36

6.12.5 MMU Assist Registers............................................................................................... 6-37

6.12.5.1 MAS Register 0 (MAS0)....................................................................................... 6-37

6.12.5.2 MAS Register 1 (MAS1)....................................................................................... 6-38

6.12.5.3 MAS Register 2 (MAS2)....................................................................................... 6-39

6.12.5.4 MAS Register 3 (MAS3)....................................................................................... 6-40

6.12.5.5 MAS Register 4 (MAS4)....................................................................................... 6-40

6.12.5.6 MAS Register 6 (MAS6)....................................................................................... 6-41

6.13 Debug Registers.............................................................................................................6-42

6.13.1 Debug Control Registers (DBCR0–DBCR2)............................................................6-42

6.13.1.1 Debug Control Register 0 (DBCR0)......................................................................6-42

6.13.1.2 Debug Control Register 1 (DBCR1)......................................................................6-43

6.13.1.3 Debug Control Register 2 (DBCR2)......................................................................6-45

6.13.2 Debug Status Register (DBSR).................................................................................. 6-46

6.13.3 Instruction Address Compare Registers (IAC1–IAC2).............................................6-47

6.13.4 Data Address Compare Registers (DAC1–DAC2).................................................... 6-48

6.14 Signal Processing and Embedded Floating-Point Status and

Control Register (SPEFSCR) .................................................................................... 6-48

6.14.1 Accumulator (ACC)................................................................................................... 6-50

6.15 Performance Monitor Registers (PMRs) ....................................................................... 6-51

6.15.1 Global Control Register 0 (PMGC0, UPMGC0)....................................................... 6-52

6.15.2 Local Control A Registers

(PMLCa0–PMLCa3, UPMLCa0–UPMLCa3)......................................................6-52

6.15.3 Local Control B Registers

(PMLCb0–PMLCb3, UPMLCb0–UPMLCb3) .....................................................6-53

6.15.4 Performance Monitor Counter Registers

(PMC0–PMC3, UPMC0–UPMC3)....................................................................... 6-54

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Chapter 7

L2 Look-Aside Cache/SRAM

7.1 L2 Cache Overview ......................................................................................................... 7-1

7.1.1 L2 Cache and SRAM Features .................................................................................... 7-2

7.2 Cache Organization.......................................................................................................... 7-3

7.3 Memory Map/Register Definition ................................................................................... 7-6

7.3.1 L2/SRAM Register Descriptions................................................................................. 7-7

7.3.1.1 L2 Control Register (L2CTL).................................................................................. 7-7

7.3.1.2 L2 Cache External Write Address Registers 0–3 (L2CEWARn) ..........................7-10

7.3.1.3 L2 Cache External Write Control Registers 0–3 (L2CEWCRn)........................... 7-10

7.3.1.4 L2 Memory-Mapped SRAM Base Address Registers 0–1

(L2SRBARn)..................................................................................................... 7-11

7.3.1.5 L2 Error Registers.................................................................................................. 7-12

7.3.1.5.1 Error Injection Registers.................................................................................... 7-13

7.3.1.5.2 Error Control and Capture Registers ................................................................. 7-15

7.4 External Writes to the L2 Cache (Cache Stashing)........................................................ 7-21

7.5 L2 Cache Timing ...........................................................................................................7-21

7.6 L2 Cache and SRAM Coherency................................................................................... 7-22

7.6.1 L2 Cache Coherency Rules........................................................................................ 7-22

7.6.2 Memory-Mapped SRAM Coherency Rules .............................................................. 7-24

7.7 L2 Cache Locking.......................................................................................................... 7-24

7.7.1 Locking the Entire L2 Cache..................................................................................... 7-25

7.7.2 Locking Programmed Memory Ranges..................................................................... 7-25

7.7.3 Locking Selected Lines.............................................................................................. 7-25

7.7.4 Clearing Locks on Selected Lines ............................................................................. 7-26

7.7.5 Flash Clearing of Instruction and Data Locks........................................................... 7-27

7.7.6 Locks with Stale Data................................................................................................ 7-27

7.8 PLRU L2 Replacement Policy....................................................................................... 7-27

7.8.1 PLRU Bit Update Considerations.............................................................................. 7-28

7.8.2 Allocation of Lines .................................................................................................... 7-29

7.9 L2 Cache Operation....................................................................................................... 7-29

7.9.1 L2 Cache States ......................................................................................................... 7-29

7.9.2 Flash Invalidation of the L2 Cache............................................................................ 7-30

7.9.3 L2 State Transitions................................................................................................... 7-30

7.10 Initialization/Application Information...........................................................................7-34

7.10.1 Initialization............................................................................................................... 7-35

7.10.1.1 L2 Cache Initialization .......................................................................................... 7-35

7.10.1.2 Memory-Mapped SRAM Initialization ................................................................. 7-35

7.10.2 Managing Errors ........................................................................................................ 7-35

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7.10.2.1 ECC Errors............................................................................................................. 7-35

7.10.2.2 Tag Parity Errors.................................................................................................... 7-36

Part III

Memory and I/O Interfaces

Chapter 8

e500 Coherency Module

8.1 Introduction...................................................................................................................... 8-1

8.1.1 Overview...................................................................................................................... 8-1

8.1.2 Features........................................................................................................................8-2

8.2 Memory Map/Register Definition ................................................................................... 8-2

8.2.1 Register Descriptions................................................................................................... 8-3

8.2.1.1 ECM CCB Address Configuration Register (EEBACR) ........................................ 8-3

8.2.1.2 ECM CCB Port Configuration Register (EEBPCR) ...............................................8-4

8.2.1.3 ECM Error Detect Register (EEDR) ....................................................................... 8-5

8.2.1.4 ECM Error Enable Register (EEER)....................................................................... 8-6

8.2.1.5 ECM Error Attributes Capture Register (EEATR)..................................................8-7

8.2.1.6 ECM Error Address Capture Register (EEADR).................................................... 8-8

8.3 Functional Description..................................................................................................... 8-9

8.3.1 I/O Arbiter....................................................................................................................8-9

8.3.2 CCB Arbiter................................................................................................................. 8-9

8.3.3 Transaction Queue ....................................................................................................... 8-9

8.3.4 Global Data Multiplexor............................................................................................ 8-10

8.3.5 CCB Interface............................................................................................................ 8-10

8.4 Initialization/Application Information........................................................................... 8-10

Chapter 9

DDR Memory Controller

9.1 Introduction...................................................................................................................... 9-1

9.2 Features............................................................................................................................ 9-2

9.2.1 Modes of Operation ..................................................................................................... 9-3

9.3 External Signal Descriptions ........................................................................................... 9-3

9.3.1 Signals Overview......................................................................................................... 9-3

9.3.2 Detailed Signal Descriptions ....................................................................................... 9-5

9.3.2.1 Memory Interface Signals........................................................................................ 9-5

9.3.2.2 Clock Interface Signals............................................................................................ 9-8

9.3.2.3 Debug Signals.......................................................................................................... 9-8

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9.4 Memory Map/Register Definition ................................................................................... 9-9

9.4.1 Register Descriptions................................................................................................... 9-9

9.4.1.1 Chip Select Memory Bounds (CSn_BNDS)..........................................................9-10

9.4.1.2 Chip Select Configuration (CSn_CONFIG)..........................................................9-10

9.4.1.3 DDR SDRAM Timing Configuration 1 (TIMING_CFG_1)................................. 9-11

9.4.1.4 DDR SDRAM Timing Configuration 2 (TIMING_CFG_2).................................9-13

9.4.1.5 DDR SDRAM Control Configuration (DDR_SDRAM_CFG)............................. 9-14

9.4.1.6 DDR SDRAM Mode Configuration (DDR_SDRAM_MODE)............................ 9-16

9.4.1.7 DDR SDRAM Interval Configuration (DDR_SDRAM_INTERVAL) ................. 9-16

9.4.1.8 Memory Data Path Error Injection Mask High

(DATA_ERR_INJECT_HI)............................................................................... 9-17

9.4.1.9 Memory Data Path Error Injection Mask Low

(DATA_ERR_INJECT_LO).............................................................................. 9-18

9.4.1.10 Memory Data Path Error Injection Mask ECC

(ECC_ERR_INJECT)........................................................................................ 9-18

9.4.1.11 Memory Data Path Read Capture High (CAPTURE_DATA_HI)......................... 9-19

9.4.1.12 Memory Data Path Read Capture Low (CAPTURE_DATA_LO)........................ 9-20

9.4.1.13 Memory Data Path Read Capture ECC (CAPTURE_ECC).................................. 9-20

9.4.1.14 Memory Error Detect (ERR_DETECT)................................................................ 9-21

9.4.1.15 Memory Error Disable (ERR_DISABLE)............................................................. 9-21

9.4.1.16 Memory Error Interrupt Enable (ERR_INT_EN).................................................. 9-22

9.4.1.17 Memory Error Attributes Capture (CAPTURE_ATTRIBUTES).......................... 9-23

9.4.1.18 Memory Error Address Capture (CAPTURE_ADDRESS) ..................................9-24

9.4.1.19 Single-Bit ECC Memory Error Management (ERR_SBE)...................................9-25

9.5 Functional Description................................................................................................... 9-25

9.5.1 DDR SDRAM Interface Operation............................................................................ 9-30

9.5.1.1 Supported DDR SDRAM Organizations............................................................... 9-31

9.5.2 DDR SDRAM Address Multiplexing........................................................................ 9-31

9.5.3 JEDEC Standard DDR SDRAM Interface Commands.............................................9-32

9.5.4 SDRAM Interface Timing ......................................................................................... 9-34

9.5.4.1 Clock Distribution ................................................................................................. 9-38

9.5.5 DDR SDRAM Mode-Set Command Timing.............................................................9-38

9.5.6 DDR SDRAM Registered DIMM Mode................................................................... 9-39

9.5.7 DDR SDRAM Write Timing Adjustments................................................................ 9-40

9.5.8 DDR SDRAM Refresh .............................................................................................. 9-41

9.5.8.1 DDR SDRAM Refresh Timing.............................................................................. 9-42

9.5.8.2 DDR SDRAM Refresh and Power-Saving Modes................................................ 9-43

9.5.8.2.1 Self-Refresh in Sleep Mode............................................................................... 9-44

9.5.9 DDR Data Beat Ordering........................................................................................... 9-45

9.5.10 Page Mode and Logical Bank Retention ................................................................... 9-45

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9.5.11 Error Checking and Correcting (ECC) ...................................................................... 9-46

9.5.12 Error Management..................................................................................................... 9-48

9.6 Initialization/Application Information........................................................................... 9-49

9.6.1 DDR SDRAM Initialization Sequence...................................................................... 9-50

Chapter 10

Programmable Interrupt Controller

10.1 Introduction....................................................................................................................10-1

10.1.1 Overview....................................................................................................................10-2

10.1.2 Features......................................................................................................................10-3

10.1.3 Interrupts to the Processor Core................................................................................. 10-4

10.1.4 Modes of Operation ................................................................................................... 10-5

10.1.4.1 Mixed Mode (GCR[M] = 1).................................................................................. 10-5

10.1.4.2 Pass-Through Mode (GCR[M] = 0) ......................................................................10-6

10.1.5 Interrupt Sources........................................................................................................ 10-6

10.1.5.1 Interrupt Routing—Mixed Mode...........................................................................10-7

10.1.5.2 Internal Interrupt Sources...................................................................................... 10-7

10.2 External Signal Descriptions ......................................................................................... 10-8

10.2.1 Signal Overview ........................................................................................................ 10-8

10.2.2 Detailed Signal Descriptions ..................................................................................... 10-8

10.3 Memory Map/Register Definition ................................................................................. 10-9

10.3.1 Global Registers....................................................................................................... 10-16

10.3.1.1 Feature Reporting Register (FRR)....................................................................... 10-16

10.3.1.2 Global Configuration Register (GCR)................................................................. 10-17

10.3.1.3 Vendor Identification Register (VIR) .................................................................. 10-17

10.3.1.4 Processor Initialization Register (PIR)................................................................10-18

10.3.1.5 IPI Vector/Priority Registers (IPIVPRn) ............................................................. 10-19

10.3.1.6 Spurious Vector Register (SVR).......................................................................... 10-19

10.3.2 Global Timer Registers............................................................................................ 10-20

10.3.2.1 Timer Frequency Reporting Register (TFRR).....................................................10-20

10.3.2.2 Global Timer Current Count Registers (GTCCRn)............................................. 10-21

10.3.2.3 Global Timer Base Count Registers (GTBCRn) ................................................. 10-21

10.3.2.4 Global Timer Vector/Priority Registers (GTVPRn) ............................................10-22

10.3.2.5 Global Timer Destination Registers (GTDRn)....................................................10-23

10.3.2.6 Timer Control Register (TCR)............................................................................. 10-24

10.3.3 IRQ_OUT

and Critical Interrupt Summary Registers.............................................10-26

10.3.3.1 IRQ_OUT Summary Register 0 (IRQSR0).........................................................10-26

10.3.3.2 IRQ_OUT Summary Register 1 (IRQSR1).........................................................10-27

10.3.3.3 Critical Interrupt Summary Register 0 (CISR0)..................................................10-27

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10.3.3.4 Critical Interrupt Summary Register 1 (CISR1)..................................................10-28

10.3.4 Performance Monitor Mask Registers (PMMRs).................................................... 10-28

10.3.4.1 Performance Monitor Mask Register (Lower) (PMnMR0).................................10-29

10.3.4.2 Performance Monitor Mask Registers (Upper) (PMnMR1)................................ 10-30

10.3.5 Message Registers.................................................................................................... 10-30

10.3.5.1 Message Registers (MSGR0–MSGR3)............................................................... 10-30

10.3.5.2 Message Enable Register (MER)......................................................................... 10-31

10.3.5.3 Message Status Register (MSR).......................................................................... 10-31

10.3.6 Interrupt Source Configuration Registers................................................................ 10-32

10.3.6.1 External Interrupt Vector/Priority Registers (EIVPR0–EIVPR11) ..................... 10-32

10.3.6.2 External Interrupt Destination Registers (EIDR0–EIDR11)...............................10-33

10.3.6.3 Internal Interrupt Vector/Priority Registers (IIVPR0–IIVPR31).........................10-34

10.3.6.4 Internal Interrupt Destination Registers (IIDR0–IIDR31) .................................. 10-35

10.3.6.5 Messaging Interrupt Vector/Priority Registers (MIVPR0–MIVPR3) ................. 10-36

10.3.6.6 Messaging Interrupt Destination Registers (MIDR0–MIDR3)........................... 10-37

10.3.7 Per-CPU Registers ................................................................................................... 10-38

10.3.7.1 Interprocessor Interrupt Dispatch Register (IPIDR0–IPIDR3) ...........................10-39

10.3.7.2 Processor Current Task Priority Register (CTPR)...............................................10-40

10.3.7.3 Who Am I Register (WHOAMI)......................................................................... 10-41

10.3.7.4 Processor Interrupt Acknowledge Register (IACK)............................................10-41

10.3.7.5 Processor End of Interrupt Register (EOI) ..........................................................10-42

10.4 Functional Description................................................................................................. 10-43

10.4.1 Flow of Interrupt Control......................................................................................... 10-43

10.4.1.1 Interrupt Source Priority...................................................................................... 10-45

10.4.1.2 Processor Current Task Priority........................................................................... 10-45

10.4.1.3 Interrupt Acknowledge........................................................................................ 10-46

10.4.2 Nesting of Interrupts................................................................................................ 10-46

10.4.3 Processor Initialization ............................................................................................10-46

10.4.4 Spurious Vector Generation..................................................................................... 10-46

10.4.5 Messaging Interrupts................................................................................................ 10-47

10.4.6 Global Timers ..........................................................................................................10-47

10.4.7 Reset of the PIC....................................................................................................... 10-47

10.5 Initialization/Application Information.........................................................................10-48

10.5.1 Programming Guidelines......................................................................................... 10-48

10.5.1.1 PIC Registers....................................................................................................... 10-48

10.5.1.2 Changing Interrupt Source Configuration ........................................................... 10-50

Chapter 11

I

2

C Interface

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Number Title

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11.1 Introduction....................................................................................................................11-1

11.1.1 Overview.................................................................................................................... 11-2

11.1.2 Features...................................................................................................................... 11-2

11.1.3 Modes of Operation ................................................................................................... 11-2

11.2 External Signal Descriptions ......................................................................................... 11-3

11.2.1 Signal Overview ........................................................................................................ 11-3

11.2.2 Detailed Signal Descriptions ..................................................................................... 11-3

11.3 Memory Map/Register Definition ................................................................................. 11-4

11.3.1 Register Descriptions................................................................................................. 11-4

11.3.1.1 I

2

C Address Register (I2CADR)........................................................................... 11-5

11.3.1.2 I

2

C Frequency Divider Register (I2CFDR)........................................................... 11-5

11.3.1.3 I

2

C Control Register (I2CCR)............................................................................... 11-6

11.3.1.4 I

2

C Status Register (I2CSR).................................................................................. 11-7

11.3.1.5 I

2

C Data Register (I2CDR).................................................................................... 11-9

11.3.1.6 Digital Filter Sampling Rate Register (I2CDFSRR)........................................... 11-10

11.4 Functional Description................................................................................................. 11-10

11.4.1 Transaction Protocol................................................................................................ 11-10

11.4.1.1 START Condition.................................................................................................11-11

11.4.1.2 Slave Address Transmission.................................................................................11-11

11.4.1.3 Repeated START Condition ................................................................................ 11-12

11.4.1.4 STOP Condition................................................................................................... 11-12

11.4.1.5 Protocol Implementation Details......................................................................... 11-13

11.4.1.5.1 Transaction Monitoring—Implementation Details.......................................... 11-13

11.4.1.5.2 Control Transfer—Implementation Details..................................................... 11-13

11.4.1.6 Address Compare—Implementation Details....................................................... 11-14

11.4.2 Arbitration Procedure .............................................................................................. 11-14

11.4.2.1 Arbitration Control .............................................................................................. 11-15

11.4.3 Handshaking ............................................................................................................ 11-15

11.4.4 Clock Control........................................................................................................... 11-15

11.4.4.1 Clock Synchronization......................................................................................... 11-16

11.4.4.2 Input Synchronization and Digital Filter............................................................. 11-16

11.4.4.2.1 Input Signal Synchronization .......................................................................... 11-16

11.4.4.2.2 Filtering of SCL and SDA Lines ..................................................................... 11-16

11.4.4.3 Clock Stretching .................................................................................................. 11-17

11.4.5 Boot Sequencer Mode.............................................................................................. 11-17

11.4.5.1 EEPROM Calling Address .................................................................................. 11-17

11.4.5.2 EEPROM Data Format........................................................................................ 11-18

11.5 Initialization/Application Information......................................................................... 11-20

11.5.1 Initialization Sequence............................................................................................. 11-20

11.5.2 Generation of START.............................................................................................. 11-21

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11.5.3 Post-Transfer Software Response............................................................................ 11-21

11.5.4 Generation of STOP................................................................................................. 11-22

11.5.5 Generation of Repeated START .............................................................................. 11-22

11.5.6 Generation of SCL When SDA Low....................................................................... 11-22

11.5.7 Slave Mode Interrupt Service Routine..................................................................... 11-23

11.5.7.1 Slave Transmitter and Received Acknowledge................................................... 11-23

11.5.7.2 Loss of Arbitration and Forcing of Slave Mode.................................................. 11-23

11.5.8 Interrupt Service Routine Flowchart........................................................................ 11-23

Chapter 12

DUART

12.1 Overview........................................................................................................................12-1

12.1.1 Features......................................................................................................................12-2

12.1.2 Modes of Operation ................................................................................................... 12-3

12.2 External Signal Descriptions ......................................................................................... 12-3

12.2.1 Signal Overview ........................................................................................................ 12-3

12.2.2 Detailed Signal Descriptions ..................................................................................... 12-3

12.3 Memory Map/Register Definition ................................................................................. 12-4

12.3.1 Register Descriptions................................................................................................. 12-6

12.3.1.1 Receiver Buffer Registers (URBR0, URBR1) ......................................................12-6

12.3.1.2 Transmitter Holding Registers (UTHR0, UTHR1) ...............................................12-6

12.3.1.3 Divisor Most and Least Significant Byte Registers

(UDMB and UDLB).......................................................................................... 12-7

12.3.1.4 Interrupt Enable Register (UIER).......................................................................... 12-9

12.3.1.5 Interrupt ID Registers (UIIR0, UIIR1)................................................................ 12-10

12.3.1.6 FIFO Control Registers (UFCR0, UFCR1)......................................................... 12-11

12.3.1.7 Line Control Registers (ULCR0, ULCR1).......................................................... 12-12

12.3.1.8 MODEM Control Registers (UMCR0, UMCR1)................................................ 12-14

12.3.1.9 Line Status Registers (ULSR0, ULSR1) ............................................................. 12-15

12.3.1.10 MODEM Status Registers (UMSR0, UMSR1)...................................................12-16

12.3.1.11 Scratch Registers (USCR0, USCR1)................................................................... 12-17

12.3.1.12 Alternate Function Registers (UAFR0, UAFR1) ................................................12-17

12.3.1.13 DMA Status Registers (UDSR0, UDSR1) .......................................................... 12-18

12.4 Functional Description................................................................................................. 12-20

12.4.1 Serial Interface......................................................................................................... 12-20

12.4.1.1 START Bit ........................................................................................................... 12-21

12.4.1.2 Data Transfer ....................................................................................................... 12-21

12.4.1.3 Parity Bit.............................................................................................................. 12-22

12.4.1.4 STOP Bit..............................................................................................................12-22

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12.4.2 Baud-Rate Generator Logic..................................................................................... 12-22

12.4.3 Local Loop-Back Mode........................................................................................... 12-22

12.4.4 Errors ....................................................................................................................... 12-23

12.4.4.1 Framing Error ...................................................................................................... 12-23

12.4.4.2 Parity Error .......................................................................................................... 12-23

12.4.4.3 Overrun Error....................................................................................................... 12-23

12.4.5 FIFO Mode .............................................................................................................. 12-24

12.4.5.1 FIFO Interrupts.................................................................................................... 12-24

12.4.5.2 DMA Mode Select............................................................................................... 12-24

12.4.5.3 Interrupt Control Logic........................................................................................ 12-25

12.5 DUART Initialization/Application Information .......................................................... 12-25

Chapter 13

Local Bus Controller

13.1 Introduction....................................................................................................................13-1

13.1.1 Overview....................................................................................................................13-2

13.1.2 Features......................................................................................................................13-2

13.1.3 Modes of Operation ................................................................................................... 13-3

13.1.3.1 LBC Bus Clock and Clock Ratios ......................................................................... 13-4

13.1.3.2 Source ID Debug Mode......................................................................................... 13-4

13.1.4 Power-Down Mode.................................................................................................... 13-4

13.1.5 References..................................................................................................................13-4

13.2 External Signal Descriptions ......................................................................................... 13-5

13.3 Memory Map/Register Definition ................................................................................. 13-9

13.3.1 Register Descriptions............................................................................................... 13-10

13.3.1.1 Base Registers (BR0–BR7) ................................................................................. 13-11

13.3.1.2 Option Registers (OR0–OR7).............................................................................. 13-12

13.3.1.2.1 Address Mask .................................................................................................. 13-13

13.3.1.2.2 Option Registers (ORn)—GPCM Mode .........................................................13-14

13.3.1.2.3 Option Registers (ORn)—UPM Mode............................................................ 13-16

13.3.1.2.4 Option Registers (ORn)—SDRAM Mode ...................................................... 13-17

13.3.1.3 UPM Memory Address Register (MAR)............................................................. 13-18

13.3.1.4 UPM Mode Registers (MxMR)........................................................................... 13-19

13.3.1.5 Memory Refresh Timer Prescaler Register (MRTPR) ........................................ 13-21

13.3.1.6 UPM Data Register (MDR)................................................................................. 13-22

13.3.1.7 SDRAM Machine Mode Register (LSDMR)......................................................13-22

13.3.1.8 UPM Refresh Timer (LURT)............................................................................... 13-24

13.3.1.9 SDRAM Refresh Timer (LSRT).......................................................................... 13-25

13.3.1.10 Transfer Error Status Register (LTESR).............................................................. 13-26

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13.3.1.11 Transfer Error Check Disable Register (LTEDR)................................................13-27

13.3.1.12 Transfer Error Interrupt Enable Register (LTEIR) .............................................. 13-28

13.3.1.13 Transfer Error Attributes Register (LTEATR).....................................................13-29

13.3.1.14 Transfer Error Address Register (LTEAR).......................................................... 13-30

13.3.1.15 Local Bus Configuration Register (LBCR).........................................................13-31

13.3.1.16 Clock Ratio Register (LCRR).............................................................................. 13-32

13.4 Functional Description................................................................................................. 13-33

13.4.1 Basic Architecture.................................................................................................... 13-34

13.4.1.1 Address and Address Space Checking ................................................................ 13-34

13.4.1.2 External Address Latch Enable Signal (LALE) .................................................. 13-35

13.4.1.3 Data Transfer Acknowledge (TA) .......................................................................13-36

13.4.1.4 Data Buffer Control (LBCTL)............................................................................. 13-37

13.4.1.5 Atomic Operation ................................................................................................ 13-37

13.4.1.6 Parity Generation and Checking (LDP)............................................................... 13-38

13.4.1.7 Bus Monitor......................................................................................................... 13-38

13.4.2 General-Purpose Chip-Select Machine (GPCM).....................................................13-38

13.4.2.1 Timing Configuration .......................................................................................... 13-39

13.4.2.2 Chip-Select Assertion Timing .............................................................................13-44

13.4.2.2.1 Programmable Wait State Configuration......................................................... 13-44

13.4.2.2.2 Chip-Select and Write Enable Negation Timing.............................................13-44

13.4.2.2.3 Relaxed Timing ............................................................................................... 13-45

13.4.2.2.4 Output Enable (LOE

) Timing.......................................................................... 13-48

13.4.2.2.5 Extended Hold Time on Read Accesses..........................................................13-48

13.4.2.3 External Access Termination (LGTA

)................................................................. 13-49

13.4.2.4 Boot Chip-Select Operation................................................................................. 13-50

13.4.3 SDRAM Machine.................................................................................................... 13-51

13.4.3.1 Supported SDRAM Configurations.....................................................................13-51

13.4.3.2 SDRAM Power-On Initialization ........................................................................13-52

13.4.3.3 Intel PC133 and JEDEC-Standard SDRAM Interface Commands..................... 13-52

13.4.3.4 Page Hit Checking ............................................................................................... 13-53

13.4.3.5 Page Management................................................................................................ 13-54

13.4.3.6 SDRAM Address Multiplexing ........................................................................... 13-54

13.4.3.7 SDRAM Device-Specific Parameters.................................................................. 13-55

13.4.3.7.1 Precharge-to-Activate Interval......................................................................... 13-55

13.4.3.7.2 Activate-to-Read/Write Interval...................................................................... 13-56

13.4.3.7.3 Column Address to First Data Out—CAS

Latency......................................... 13-56

13.4.3.7.4 Last Data In to Precharge—Write Recovery...................................................13-56

13.4.3.7.5 Refresh Recovery Interval (RFRC) ................................................................. 13-57

13.4.3.7.6 External Address and Command Buffers (BUFCMD).................................... 13-57

13.4.3.8 SDRAM Interface Timing ................................................................................... 13-58

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NXP MPC8540 Reference guide

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