Motorola MPC505EVB User manual

MPC505EVB/D

March 1997

MPC505EVB

EVALUATION BOARD

USER’S MANUAL

Motorola reserves the right to make changes without further notice to any products herein to

improve reliability, function, or design. Motorola does not assume any liability arising out of the

application or use of any product or circuit described herein; neither does it convey any license

under its patent rights nor the rights of others. Motorola products are not designed, intended, or

authorized for use as components in systems intended for surgical implant into the body, or other

application in which the failure of the Motorola product could create a situation where personal

injury or death may occur. Should Buyer purchase or use Motorola products for any such

unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its

officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs,

damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any

claim of personal injury or death associated with such unintended or unauthorized use, even if

such claim alleges that Motorola was negligent regarding the design or manufacture of the part.

Motorola and the Motorola logo are registered trademarks of Motorola Inc.

Motorola Inc. is an Equal Opportunity/Affirmative Action Employer.

PowerPC is a trademark of International Business Machines Corporation.

CONTENTS

MPC505EVB/D iii

CONTENTS

CHAPTER 1 GENERAL INFORMATION

1.1 INTRODUCTION.............................................................................................................1-1

1.2 FEATURES.......................................................................................................................1-1

1.3 GENERAL DESCRIPTION.............................................................................................1-2

1.4 SPECIFICATIONS...........................................................................................................1-3

1.5 EQUIPMENT REQUIRED...............................................................................................1-4

CHAPTER 2 HARDWARE PREPARATION AND INSTALLATION

2.1 INTRODUCTION.............................................................................................................2-1

2.2 HARDWARE PREPARATION.......................................................................................2-1

2.2.1 Crystal Clock Select Header (J1).............................................................................2-5

2.2.2 Clock Source Select Header (J2)..............................................................................2-6

2.2.3 Keep Alive Power 2 Select Header (J3)...................................................................2-6

2.2.4 Keep Alive Power 2 Select Header (J4)...................................................................2-7

2.2.5 Burst Memory Select Header (J5)............................................................................2-7

2.2.6 System Clock Selection Headers (J6 and J7)...........................................................2-8

2.2.7 EVB LED Descriptions............................................................................................2-9

2.2.8 Optional Memory Configuration..............................................................................2-9

2.2.9 EVB Reset Switches...............................................................................................2-10

2.2.10EVB DIP Switches.................................................................................................2-10

2.2.10.1Chip Select Dip Switch (DS1).......................................................................2-11

2.3.10.2Reset Data Dip Switches (DS2 – DS5).........................................................2-12

2.2.10.3DTE/DCE Settings........................................................................................2-15

2.3 INSTALLATION INSTRUCTIONS..............................................................................2-16

2.3.1 Host Computer – EVB Interconnection.................................................................2-16

2.3.2 Background Mode Connector (P5).........................................................................2-17

2.3.3 Power Supply – EVB Interconnection....................................................................2-18

2.3.4 RS-232C – EVB Interconnection...........................................................................2-19

2.3.5 EVB Expansion Connectors...................................................................................2-20

2.3.6 Logic Analyzer Connectors....................................................................................2-22

2.3.7 SCSI........................................................................................................................2-23

CONTENTS

iv MPC505EVB/D

CHAPTER 3 FUNCTIONAL DESCRIPTION

3.1 INTRODUCTION.............................................................................................................3-1

3.2 EVB DESCRIPTION........................................................................................................3-1

3.3 MCU SUMMARY............................................................................................................3-3

3.3.1 32-Bit Central Processor Unit....................................................................................3-3

3.3.2 Time Processor Unit..................................................................................................3-4

3.3.3 Queued Serial Module...............................................................................................3-4

3.3.4 Random Access Memory...........................................................................................3-4

3.3.5 External Bus Interface...............................................................................................3-5

3.3.6 Chip Selects...............................................................................................................3-5

3.3.7 System Clock.............................................................................................................3-5

3.3.8 Test Module...............................................................................................................3-5

3.4 USER MEMORY..............................................................................................................3-5

3.5 I/O CONNECTORS..........................................................................................................3-7

3.5.1 64-Pin Expansion Connectors...................................................................................3-7

3.5.2 Serial Communication Connectors............................................................................3-7

3.5.3 Background Mode Interface Connector.....................................................................3-7

3.6 PFB DESCRIPTION.........................................................................................................3-7

3.6.1 Floating-Point Coprocessor Socket (U5)...................................................................3-7

3.6.2 Logic Analyzer Connectors.......................................................................................3-8

CHAPTER 4 SUPPORT INFORMATION

4.1 INTRODUCTION.............................................................................................................4-1

4.2 CONNECTOR SIGNAL DESCRIPTIONS......................................................................4-1

FIGURES

2-1. EVB Connector, Switch, and Jumper Header Location Diagram.....................................2-2

2-2. Power Supply Connector (P7).........................................................................................2-18

2-3. Expansion Connector P6 Pin Assignments.....................................................................2-20

2-4. Expansion Connector P7 Pin Assignments.....................................................................2-21

3-1. EVB Block Diagram.........................................................................................................3-2

3-2. EVB Memory Map............................................................................................................3-6

CONTENTS

MPC505EVB/D v

TABLES

1-1. EVB Specifications........................................................................................................... 1-3

1-2. External Equipment Requirements ................................................................................... 1-4

2-1. Jumper Header Types........................................................................................................ 2-3

2-2. MPFB Jumper Header Descriptions.................................................................................. 2-3

2-3. MF and RFD Bits Required to Set Clock Speed............................................................... 2-5

2-4. System Clock Source Configuration................................................................................. 2-8

2-5. Optional Memory Configuration....................................................................................... 2-9

2-6. Chip Select Dip Switch (DS1) ........................................................................................ 2-11

2-7. Data Bus Reset Configuration Word............................................................................... 2-12

2-8. DS6 Communication Type Switch Settings.................................................................... 2-15

2-9. SCSI Port Parts List......................................................................................................... 2-23

4-1. SCSI Connector (not populated)....................................................................................... 4-2

4-2. RS-232C I/O Connector P2 Pin Assignments................................................................... 4-4

4-3. RS-232C I/O Connector P3 Pin Assignments................................................................... 4-5

4-4. Host Computer Connector P4 Pin Assignments ............................................................... 4-6

4-5. Debug Mode Connector P5 Pin Assignments................................................................... 4-7

4-6. P6 Expansion Connector Pin Assignments....................................................................... 4-8

4-7. Input Power Connector P7 Pin Assignments.................................................................... 4-9

4-8. P8 Expansion Connector Pin Assignments....................................................................... 4-9

4-9. Logic Analyzer Connector POD1 Pin Assignments....................................................... 4-12

4-10. Logic Analyzer Connector POD2 Pin Assignments....................................................... 4-12

4-11. Logic Analyzer Connector POD3 Pin Assignments....................................................... 4-12

4-12. Logic Analyzer Connector POD4 Pin Assignments....................................................... 4-13

4-13. Logic Analyzer Connector POD5 Pin Assignments....................................................... 4-13

4-14. Logic Analyzer Connector POD6 Pin Assignments....................................................... 4-14

4-15. Logic Analyzer Connector POD7 Pin Assignments....................................................... 4-15

CONTENTS

vi MPC505EVB/D *PRELIMINARY

GENERAL INFORMATION

MPC505EVBUM/D 1-1

CHAPTER 1

GENERAL INFORMATION

1.1 INTRODUCTION

This manual provides general information, hardware preparation, installation instructions, and

support information for the MPC505EVB Evaluation Board (EVB). The EVB lets you evaluate

PowerPC MPC505 RISC Microcontrollers.

1.2 FEATURES

EVB features include:

• MPC505 MCU running at 4-33 MHz (the default is 4 MHz)

• 512 kilobytes of flash memory (may be upgraded to 2 megabytes)

• 128 kilobytes of synchronous static RAM (may be upgraded to 1 megabyte)

• Serial port with 25-pin RS-232 connector to host computer

• MC68681 DUART providing two serial interfaces for RS-232 evaluation

• MC68HC711 MCU for the background debug mode port interface

• SCSI-2 port (optional)

• Expansion connectors for the MPC505 MCU signals

• 20-pin logic analyzer connectors for the MPC505 MCU signals

• 5-volt-to-3.3-volt converter for the MPC505 and signal buffers operation

• Reset data configuration switches

• Crystal or crystal oscillator operation

GENERAL INFORMATION

1-2 MPC505EVBUM/D

1.3 GENERAL DESCRIPTION

The EVB is a low-cost tool for evaluating and debugging MPC505 MCU-based systems. The

MPC505 MCU device is an advanced single-chip MCU with on-chip memory and peripheral

functions. For more information refer to the PowerPC MPC505 RISC Microcontroller Technical

Summary (MPC505TS/D).

The EVB includes a monitor/debugging program (MPCbug) that demonstrates the capabilities of

the MPC505. You can debug user code under control of the MPCbug monitor program, assemble

it (as either a Motorola S-record, COFF, or ELF file) and download it to RAM.

The Motorola S-record format lets you encode programs or data files in a printable format for

transportation between computer systems. The transportation process can therefore be monitored

and the S-records easily edited. Refer to Appendix A for additional S-record information.

The EVB has one host computer port (P4), two RS-232C serial ports (P2 and P3) and a

background debug mode port (P5). The host computer port (DB-25 connector) is for

downloading S-records and communicating with the EVB via a host computer. You can

configure P4 as DTE or DCE. P4 is fixed at 19200 baud. P2 and P3 (DB-9 connectors) on the

EVB are RS-232C I/O ports. These two I/O ports let you evaluate MPC505 control of RS-232

communication. These ports can be configured as either data computer equipment (DCE) or data

terminal equipment (DTE) protocol via a set of switches. (An example of DCE is a modem and

DTE a computer terminal). These serial ports are available to you at all times; the development

system monitor, MPCbug, does not require these ports. Supported baud rates for P2 and P3 are

1200 to 19200. P5 (10-pin berg) lets you communicate with the MPC505 MCU in background

debug mode.

The EVB requires a user-supplied +5 Vdc power supply. The power supply voltage is converted

to +3.3 Vdc by the EVB on-board voltage converter. +3.3 Vdc is the voltage required by the

MPC505 MCU.

The EVB comes with a 4 MHz crystal and a socket for a crystal oscillator. The EVB is factory

configured to use the 4 MHz crystal as the input. You can increase the clock frequency up to 33

MHz (refer to paragraph 2.2.8).

All MPC505 MCU signals are available, unbuffered, on the expansion connectors and logic

analyzer connectors. The logic analyzer connectors let you monitor MPC505 MCU activity

during the development stage.

There are four flash memory devices (U24, U25, U27, and U28) on the EVB that provide 512

kilobytes of program storage memory. These devices are organized as long-word (32 bits wide).

You may program on-board flash memory using the MPCbug commands to download the

program via the debug port and run the programming algorithm. Flash memory may be upgraded

GENERAL INFORMATION

MPC505EVBUM/D 1-3

to 2 megabytes by replacing the devices at locations U24, U25, U27, and U28 with larger

devices. The flash memory devices require +5 volts.

There are a total of eight 52-pin PLCC sockets on the EVB (U19, U20, U21, U22, U29, U30,

U31, and U32) for synchronous static RAM (SSRAM) devices. These sockets are paired as upper

and lower words and organized for long-word (32 bits wide) data transfers. Each pair is referred

to as BANKx.

The SSRAM factory default for the EVB is 128 kilobytes installed in BANK1 (U19 and U29).

These devices have 9 nanosecond access times and zero wait state cycles. On-board SSRAM may

be expanded to 256 kilobytes by replacing the devices at locations U19 and U29 with larger

devices.

Alternately, you may increase the amount of on-board SSRAM by populating U20, U21, U22,

U30, U31, and U32 with additional SSRAM devices. You may increase the SSRAM size up to 1

megabytes. (For information on increasing on-board memory see paragraph 2.2.9.)

The EVB includes an optional SCSI-2 port connection on the MPC505. The required parts are

not provided, and the user may add them if the SCSI port is needed. A list of the required parts

are provided in Chapter 2.

1.4 SPECIFICATIONS

Table 1-1 lists the EVB specifications.

Table 1-1. EVB Specifications

Characteristics Specifications

MCU MPC509 MCU is used to emulate the

MPC505 MCU

I/O ports:

I/O devices

Host computer

RS-232C compatible

Temperature:

Operating

Storage

+25C

0 to +50 degrees C

Relative humidity 0 to 90% (non-condensing)

Power requirements +5 Vdc @ 2.0 A (min.)

Dimensions: 9.173 in. X 6.299 in. (23.3 cm X 16.0 cm)

GENERAL INFORMATION

1-4 MPC505EVBUM/D

1.5EQUIPMENT REQUIRED

Table 1-2 lists the external equipment requirements for EVB operation.

Table 1-2. External Equipment Requirements

External Equipment

+5 Vdc power supply

SUN host computer

RS-232C cable assembly

HARDWARE PREPARATION AND INSTALLATION

MPC505EVBUM/D 2-1

CHAPTER 2

HARDWARE PREPARATION AND INSTALLATION

2.1 INTRODUCTION

This chapter provides unpacking instructions, hardware preparation, and installation instructions

for the EVB. Chapter 6 is a description of the EVB Diagnostic Monitor (MPCdiag).

2.2 HARDWARE PREPARATION

This paragraph describes the preparation of EVB components prior to use. These preparations

ensure that the EVB components are properly configured. The EVB has been factory-tested and

shipped with factory-installed jumpers. Figure 2-1 shows the EVB connector, switch, and jumper

header locations. The EVB consists of:

• Dip switch DS1 lets you disconnect the on-board chip selects so you can use them on

the target board.

• Dip switches DS2 through DS5 define the data bus reset configuration word.

• Dip switch DS6 sets P2 ,P3 ,P4 and for BDM connector as DTE or DCE.

• Jumper headers J1 through J7 are for customizing EVB operation (described in Table

2-2 and paragraphs 2.2.1 through 2.2.5).

• Connector P1 is a SCSI interface connector (not populated).

• Connectors P2 and P3 let you connect RS-232C devices to the EVB for evaluation

purposes.

• Connector P4 is the serial port for communicating with the EVB using a host

computer. You must supply your own cable for communication with the EVB.

• Connector P5 is the debug mode port for communicating with the EVB in background

debug mode.

• Expansion connectors P6 and P8 let you connect MPC505 MCU signals to a target

board.

• Connector P7 is the EVB +5 Vdc power connector.

• POD1 through POD7 are 20-pin logic analyzer connectors for use in evaluating

MPC505 MCU signals.

• Switch SW1 lets you reset the MPC505 MCU.

• Switch SW2 lets you reset the EVB.

HARDWARE PREPARATION AND INSTALLATION

2-2 MPC505EVBUM/D

Figure 2-1. EVB Connector, Switch, and Jumper Header Location Diagram

HARDWARE PREPARATION AND INSTALLATION

MPC505EVBUM/D 2-3

Table 2-1. Jumper Header Types

Jumper Header

Type Symbol Description

two-pin with solder

strap

Two-pin plate through holes (without jumper header block) and

designated as JX (X = the jumper header number). Bus wire

soldered between the two pins of the plate through holes to

create a short.

two-pin Two-pin jumper header and designated as JX (X = the jumper

header number). Use a fabricated jumper to create a short

between the two pins of the jumper header.

two-pin with jumper Two-pin jumper header with jumper, designated as JX (X = the

jumper header number).

three-pin Three-pin jumper header, designated as JX (X = the jumper

header number). Use a fabricated jumper to create a short

between two of the three pins of the jumper header.

three-pin with jumper Three-pin jumper header with jumper and designated as JX (X =

the jumper header number). To change the factory jumper header

configuration, move the jumper to the two desired pins.

Table 2-2. MPFB Jumper Header Descriptions

Jumper

Header Type Description

J1

Crystal clock

sourcr select

header

(XTAL)

2 1

Bus wire soldered between pins 1 and 2 (factory default); selects the EVB

on-board 4 MHz crystal clock source.

Bus wire between pins 1 and 2 is removed; lets you select an external

clock source as the MCU EXTAL input signal.

J2

Clock

oscillator

source select

header

(EXTAL)

3 2 1

Bus wire between pins 1 and 2; lets you select an crystal oscillator clock

source as the MCU EXTAL input signal. (You must remove the bus wire

between pins 1 and 2 on

Bus wire soldered between pins 2 and 3 (factory default); selects the EVB

on-board 4 MHz crystal clock source.

J3

Keep alive

power 2 select

header

3 2 1

Jumper installed on pins 1 and 2 (factory default); keep alive power 2 is

active as long as power is applied to the EVB (+3.3 Vdc present on the

VKAPWR2 pin of the MCU).

+3.3 Vdc external power supply attached to pins 2 and 3; maintains MCU-

internal RAM after EVB power is turned OFF.

HARDWARE PREPARATION AND INSTALLATION

2-4 MPC505EVBUM/D

Table 2-2. MPFB Jumper Header Descriptions (continued)

Jumper

Header Type Description

J4

Keep alive

power 1 select

header

3 2 1

Jumper installed on pins 1 and 2 (factory default); MCU-internal oscillator,

time base, and decrementer operates as long as power is applied to the

EVB (+3.3 Vdc present on the VKAPWR2 pin of the MCU).

+3.3 Vdc external power supply attached to jumper header J4 pins 2 and 3;

maintains MCU-internal oscillator, time base, and decrementer operates

after EVB power is turned OFF.

J5 Unused

J6,

System clock

selection

header

3

2

1

Jumper installed on pins 1 and 2 (factory default); jumper headers J6 and

J7 select the MCU clock mode. The state of this signal during reset selects

the source of the system clock.

J7

System clock

selection

header

3

2

1

Jumper installed on pins 1 and 2 (factory default); jumper headers J6 and

J7 select the MCU clock mode.

HARDWARE PREPARATION AND INSTALLATION

MPC505EVBUM/D 2-5

2.2.1 Crystal Clock Select Header (J1)

Jumper header J1 connects the crystal clock to the MCU XTAL pin clock source. The drawing

below shows the factory configuration: bus wire soldered on pins 1 and 2. This configuration

selects the crystal clock source; crystal in socket at located Y1. When you want to use the clock

oscillator as the EVB clock, remove the bus wire on J1 and move the bus wire on J2 from pins 2

and 3 to pins 1 and 2 (see paragraph 2.2.2). This disconnects the MCU XTAL pin from the

crystal clock circuit at location Y1 and selects the clock oscillator (U7) as the MCU clock source.

The frequency of the crystal clock circuit is 4 MHz. The frequency of the crystal oscillator circuit

can be as fast as 40 MHz.

J1

21

Bus Wire

The EVB comes with a 4 MHz crystal and a socket for a crystal oscillator. The EVB is factory

configured to use the 4 MHz crystal as the input. You can configure the clock frequency up to 33

MHz by setting the MF bits (bits 9-12) and RFD bits (bits 28-31) in register SCCR at address

0x8007_FC50 (shown in Table 2-3).

Table 2-3. MF and RFD Bits Required to Set Clock Speed

CLKOUT (megahertz)

RFD [0:3] MF=

X000

(X4)

MF=

X001

(X5)

MF=

X010

(X6)

MF=

X011

(X7)

MF=

X100

(X8)

MF=

X101

(X9)

MF=

X110

(X10)

MF=

X111

(X11)

0 = 0000 16 20 24 28 32 NA NA NA

1 = 0001 8 10 12 14 16 18 20 22

2 = 0010 4567891011

3 = 0011 2 2.5 3

2

3.5 4 4.5 5 5.5

4 = 0100 1 1.25 1.5 1.75 2 2.25 2.5 2.75

5 = 0101 .5 .625 .75 .875 1 1.125 1.25 1.375

6 = 0110 .25 .313 .375 .438 .5 .563 .625 .688

7 = 0111 .125 .156 .188 .219 .25 .281 .313 .344

HARDWARE PREPARATION AND INSTALLATION

2-6 MPC505EVBUM/D

2.2.2 Clock Source Select Header (J2)

Use jumper header J2 to select either a crystal or clock oscillator as the MCU clock source. The

drawing below shows the factory configuration: bus wire soldered on pins 2 and 3. This

configuration selects the crystal clock source; crystal in socket at located Y1. When you want to

use the clock oscillator as the EVB clock, move the bus wire on J2 from pins 2 and 3 to pins 1

and 2 and remove the bus wire on J1 (see paragraph 2.2.1). This disconnects the MCU XTAL pin

from the crystal clock circuit at location Y1 and selects the crystal oscillator (U7) as the MCU

clock source. The frequency of the crystal clock circuit is 4 MHz. The frequency of the crystal

oscillator circuit can be as fast as 40 MHz.

J2

321

Bus Wire

2.2.3 Keep Alive Power 2 Select Header (J3)

Jumper header J3 provides power to the MCU-internal RAM module via the MCU VKAPWR2

pin. You may use either the on-board +3.3 Vdc (jumper on J3 pins 1 and 2) or connect an

external +3.3 Vdc power supply to J3 pins 2 and 3. An external +3.3 Vdc power supply on J3

pins 2 and 3 will maintain MCU-internal RAM data after EVB power is turned OFF. To attach

an external power supply to VKAPWR2: remove the jumper on J3 pins 1 and 2, and connect the

power supply ground to J3 pin 3 and +3.3 Vdc to pin 2.

CAUTION

Applying power to the EVB with J4 removed and no external

power supply attached to J4 will damage the MPC505 MCU.

Always keep a jumper or an external +3.3 Vdc power supply on J4

pins 1 and 2. If using an external power supply, apply VKAPWR1

before powering up the EVB.

HARDWARE PREPARATION AND INSTALLATION

MPC505EVBUM/D 2-7

2.2.4 Keep Alive Power 2 Select Header (J4)

Jumper header J3 provides power to the MCU-internal oscillator, time base, and decementer

modules via the MCU VKAPWR1 pin. You may use either the on-board +3.3 Vdc (jumper on J4

pins 1 and 2) or connect an external +3.3 Vdc power supply to J4 pins 2 and 3. An external +3.3

Vdc power supply on J4 pins 2 and 3 will maintain MCU-internal RAM data after EVB power is

turned OFF. To attach an external power supply to VKAPWR1: remove the jumper on J4 pins 1

and 2, and connect the power supply ground to J4 pin 3 and +3.3 Vdc to pin 2.

CAUTION

Applying power to the EVB with J4 removed and no external

power supply attached to J4 will damage the MPC505 MCU.

Always keep a jumper or an external +3.3 Vdc power supply on J4

pins 1 and 2. If using an external power supply, apply VKAPWR1

before powering up the EVB.

2.2.5 Burst Memory Select Header (J5)

Unused.

HARDWARE PREPARATION AND INSTALLATION

2-8 MPC505EVBUM/D

2.2.6 System Clock Selection Headers (J6 and J7)

Jumper headers J6 and J7 let you define the system clock source. The factory configuration

(shown below) is for normal operation; a fabricated jumper on J6 and J7 pins 1 and 2. Refer to

Table 2-4 for configuring the system clock source.

Table 2-4. System Clock Source Configuration

MODCLK (J6)

Jumper Settings

VDDSYN (J7)

Jumper Settings

System Phase-Lock-

Loop Options

1 and 2 (default) 1 and 2 (default) Normal Operation

2 and 3 1 and 2 1:1 Mode

1 and 2 2 and 3 SPLL Bypass Mode

2 and 3 2 and 3 Special Test Mode

J7

3

2

1

Fabricated Jumpers

J6

3

2

1

HARDWARE PREPARATION AND INSTALLATION

MPC505EVBUM/D 2-9

2.2.7 EVB LED Descriptions

There are three LEDs on the EVB. Their functions are:

• LD1 – 3.3 Vdc power: ON = 3.3 Vdc power is applied to the EVB.

• LD2 – Debug Mode: ON = MPC505 is in debug mode

• LD3 – +5 Vdc power: ON = power is applied to the EVB.

2.2.8 Optional Memory Configuration

There are eight 52-pin PLCC sockets on the EVB (U19, U20, U21, U22, U29, U30, U31, and

U32) for synchronous static RAM (SSRAM) devices. These sockets are paired as upper and

lower words and organized for long-word (32 bits wide) data transfers. Each pair is refered to as

BANKx. Table 2-5 shows on-board, memory configuration options.

Table 2-5. Optional Memory Configuration

Bank Upper Word Lower Word 64Kb Memory

Part Numbers

128Kb Memory

Part Numbers

BANK1 U29 U19 MCM67M518 MCM67M618

BANK2 U30 U20 MCM67M518 MCM67M618

BANK3 U31 U21 MCM67M518 MCM67M618

BANK4 U32 U22 MCM67M518 MCM67M618

The SSRAM factory default for the EVB is 128 kilobytes (two 64Kb I.C.s) installed in BANK1

(U19 and U29). You may increase the amount of on-board SSRAM to 256 kilobytes by

increasing the memory in sockets U19 and U29. You can further expand on-board memory by

populating U20, U21, U22, U30, U31, and U32 with additional SSRAM devices in each bank.

The EVB can have up to 1 megabyte of on-board SSRAM.

HARDWARE PREPARATION AND INSTALLATION

2-10 MPC505EVBUM/D

2.2.9 EVB Reset Switches

There are two reset switches on the EVB:

• Switch SW1 lets you reset the MPC505 MCU

• Switch SW2 lets you reset the EVB.

2.2.10 EVB DIP Switches

There are six DIP switches on the EVB (DS1 – DS6):

• DS1 – Attaches the MCU chip selects to the EVB on-board memory and peripheral

devices. You may disable on-board chip selects and connect them via the expansion

connectors (P6 and P8) to external memory or peripheral devices.

• DS2, DS3, DS4, DS5 – Data Bus Reset Configuration Word

• DS6 – On the EVB are 3 RS232 ports (P2, P3, & P4) and one background debug

mode connector (P5). Each of the RS-232 ports can be either DTE or DCE port

(defined by DS6 switches 2, 3 and 4). While the host computer may be connected to

the RS-232 port or the debug mode connector (DS6 switch 1).

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Motorola MPC505EVB User manual

Motorola MPC505EVB User manual

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