Contents
1 Introduction ............................................................................................................................9
1.1 Applications of the ERTEC 200..............................................................................................................9
1.2 Features of the ERTEC 200...................................................................................................................9
1.3 Structure of the ERTEC 200...................................................................................................................10
1.4 ERTEC 200 Package.............................................................................................................................11
1.5 Signal Function Description....................................................................................................................12
1.5.1 GPIO 0 to 31 and Alternative Functions.........................................................................................12
1.5.2 JTAG and Debug...........................................................................................................................13
1.5.3 Trace Port......................................................................................................................................13
1.5.4 Clock and Reset ............................................................................................................................14
1.5.5 Test Pins........................................................................................................................................14
1.5.6 EMIF (External Memory Interface).................................................................................................14
1.5.7 LBU, MII Interface or ETM Trace Interface....................................................................................16
1.5.8 Ethernet PHY1 and PHY2..............................................................................................................18
1.5.9 Power Supply.................................................................................................................................19
2 ARM946E-S Processor ..........................................................................................................21
2.1 Structure of ARM946E-S........................................................................................................................21
2.2 Description of ARM946E-S ....................................................................................................................22
2.3 Operating Frequency of ARM946E-S.....................................................................................................22
2.4 Cache Structure of ARM946E-S.............................................................................................................22
2.5 Tightly Coupled Memory (TCM).............................................................................................................22
2.6 Memory Protection Unit (MPU) ..............................................................................................................23
2.7 Bus Interface of ARM946E-S .................................................................................................................23
2.8 ARM946E-S Embedded Trace Macrocell (ETM9)..................................................................................23
2.9 ARM Interrupt Controller (ICU)...............................................................................................................23
2.9.1 Prioritization of Interrupts...............................................................................................................24
2.9.2 Trigger Modes................................................................................................................................24
2.9.3 Masking the Interrupt Inputs ..........................................................................................................24
2.9.4 Software Interrupts for IRQ............................................................................................................24
2.9.5 Nested Interrupt Structure..............................................................................................................24
2.9.6 EOI End-Of-Interrupt......................................................................................................................24
2.9.7 IRQ Interrupt Sources....................................................................................................................25
2.9.8 FIQ Interrupt Sources ....................................................................................................................25
2.9.9 IRQ Interrupts as FIQ Interrupt Sources........................................................................................26
2.9.10 Interrupt Control Register...............................................................................................................26
2.9.11 ICU Register Description ...............................................................................................................27
2.10 ARM946E-S Register.............................................................................................................................31
3 Bus System of the ERTEC 200..............................................................................................32
3.1 “Multilayer AHB” Communication Bus....................................................................................................32
3.1.1 AHB Arbiter....................................................................................................................................32
3.1.2 AHB Master-Slave Coupling..........................................................................................................32
3.2 APB I/O Bus...........................................................................................................................................32
4 I/O on APB bus.......................................................................................................................33
4.1 BOOT ROM............................................................................................................................................33
4.1.1 Booting from External ROM...........................................................................................................34
4.1.2 Booting via SPI..............................................................................................................................34
4.1.3 Booting via UART ..........................................................................................................................34
4.1.4 Booting via LBU.............................................................................................................................34
4.1.5 Memory Swapping.........................................................................................................................34
4.2 General Purpose I/O (GPIO)..................................................................................................................35
4.2.1 Address Assignment of GPIO Registers........................................................................................36
4.2.2 GPIO Register Description.............................................................................................................36
4.3 Timer 0/1/2.............................................................................................................................................38
4.3.1 Timer 0 and Timer 1.......................................................................................................................38
4.3.1.1 Timer 0/1 Interrupts...............................................................................................................39
4.3.1.2 Timer 0/1 Prescaler...............................................................................................................39
4.3.1.3 Cascading of Timers 0/1.......................................................................................................39
4.3.2 Timer 2...........................................................................................................................................39
4.3.3 Address Assignment of Timer Registers........................................................................................40
4.3.4 Timer Register Description ............................................................................................................40
4.4 F-Timer Function....................................................................................................................................43
4.4.1 Address Assignment of F-Timer Registers ....................................................................................44
Copyright © Siemens AG 2007. All rights reserved. Page 5 ERTEC 200 Manual
Technical data subject to change Version 1.1.0