68705_EVM_jun85 68705 EVM Jun85

User Manual: 68705_EVM_jun85

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______________

MICROSYSTEMS

1_

®

MOTOROLA

MC68705 and

MC1468705

Evaluation Modules

• Economical Means

of

Evaluating and

Programming

the

Following EPROM MCU's

-MC6870SP3,

R3,

U3

(part

#M6870SEVM)

-MC146870SG2 (RS7 Mask) (Part #M146870SEVM)

• Requires

Only

Power

Supply

and Terminal

for

Operation

•

Monitor/Debugger

Uses SYMbug-Type Syntax

• One Line Assembler/Disassembler

• Cassette

Download/Upload

• Centronics

Compatible

Printer Port

• Dual

Memory

Maps: 4K ROM -

Monitor

Map

4K RAM -User Map

• Programmer

for

On-Chip

EPROM

• Target MCU

I/O

Available

•

On-Chip

A/D

(MC6870SR3) and

Timer

• Power-On Reset

• User Reset/Abort Switches

• External

Clock

Input

• Wirewrap Area

The

M6870S/146870S Evaluation

Modules

(EVM) are

economical

vehicles

for

evaluating

the

MC6870S

and

MC146870S

Microcomputer

Units

(MCU) by

providing

all

of

the essential

timing

and

I/O

interface circuitry.

The

EVM

vastly simplifies user operation

of

the MCU im plementa-

tion. A block diagram

of

the

EVM is

shown

in

Figure

1.

Centronics

is

a trademark

of

Centronics

Inc.

SYMbug is a trademark

of

Motorola

Inc.

M68705EVM

M1468705EVM

Operation

of

an MC6870S

or

MC146870S is

simulated

by the resident MC680S

or

MC14680S MCU. Data transfer

within

the EVM is controlled by

the

monitor

ROM firmware.

I n turn, this ROM

is

controlled

from an external RS-232C

compatible

user terminal. User

object

code

may be

down-

loaded

to

the user

program

RAM via

the

host port; a cas-

sette

port

is

also provided

for

this purpose. The host and

terminal

port

ACIA's are baud rate strap-selectable from

110

to

19.2 Kbps in eight steps.

The

MCU

parallel

I/O

ports

allow

the

user

to

connect

externally

to

the

simulated MCU I/O lines. These lines are

also used to

control

the

MC6870S

or

MC146870S MCU's

on-Chip EPROM

programmer.

This

is

accomplished

by

inserting the

MCU

into

the

programmer

socket and exe-

cuting

the

appropriate

monitor

commands.

A user

jumper-select

option

allows either the

on-board

clock

or

an external clock

to

be used. A printer port

is

also

provided

with

a

Centronics

compatible

pin-out.

Special

user circuits may be added on a wirewrap area on the board.

Figure 2 illustrates

the

memory

maps for·the Evaluation

Modules. Table 1 describes the

Monitor

Command Set used

with the modules.

OS4050

©MOTOROLA

INC., 1984

M68705EVM

M1468705EVM

FIGURE 1 - EVM Block Diagram

CONTROL

MCU

MC6805R2 on M68705 EVM

or

MC146805G2 on M1468705EVM

r-------I___

TIMER

I USER

I-'-~

__________________

~

:

APPLICATION

~_____

A/D

L - - - -

__

...J

(M68705EVM

ONLY)

RAM

STACK

MONITOR

ROM

r - - - - - ,

...

__

a....-~

TERMINAL

AD

DR

DATA

CNTL

a:

Cl

Cl

«

a:

0

I--

Z

0

~

DECODE

&

MAP

SWITCH

LOGIC

(MONITOR)

(USER)

« ..J

a:

« ..J

f-

I--

Cl

I-- I--

« Z

Cl

« z

Cl

0 «

Cl

0

II:

a:

a:

a: a:

0 0 w w W

f-

I--

en

en

en

Z Z

::>

::>

::>

0 0

~

~

MICROSYSTEMS

_

RAM

STACK

USER

PSEUDO

ROM

USER

I/O

PORTS

I

TERMINAL:

RS-232C

~

___

__

J

--:--

PORT

nf--C"s~;--l

~l

~':':L~C~~O~

J

L--

___

.....

I

BAUD

I

RATES

CLOCK

J

~

4FO

r

0"

P~I

(;'N-;'

~

~

_ .':N----.:....:..-I---+---e

I

EXTERNAL

1------..,1-------

...

-'<>_

I

CLOCK

I

L

_____

.J

f

-O~~~N-;'~

-1

..

--=------1

HOST

I SOFTWARE I RS-232C

I

DEVELOPMENT

I

___

--.-.

PORT

I SYSTEM I

L

______

-J

ON-CHIP

EPROM

PROGRAMMER

&

READER

CASSETTE

PORT

PRINTER

PORT

-----,

:

OPTIONAL

I

L-----

...

:""I

CENTRONICS

I

~

_

~~:"E~_J

M68705EVM

M1468705EVM

MONITOR

MAP

TERMINAL

-

CNTL

-DATA

HOST

-

CNTL

-DATA

CASSETTE -DATA

-CNTL

PRI

NTER -DATA

-CNTL

RESERVED

RESERVED

RESERVED

RESERVED

USER STACK PNTR

MONITOR

CNTL

RESERVED

RESERVED

MONITOR

RAM/STACK

MONITOR

ROM

MONITOR

ROM

VECTORS

MICROSYSTEMS

_

FIGURE

2 - EVM Memory Maps

$000

2

3

4

5

6

7

S

9

A

B

C

D

E

F

$010

•

•

$07F

$OSO

•

•

•

•

•

•

•

•

•

$7F7

$7FS

$7FF

$SOO

•

•

•

•

•

•

•

•

•

•

$FF7

$FFB

($1

FFS)

$FFF

($1

FFF)

USER MAP

PORT A - DATA

PORT B - DATA

PORT C - DATA

PORT D - DATA

PORT A - DDR

PORT B - DDR

PORT C - DDR

PORT D - DDR

TIMER -DATA

TIMER -

CNTL

MISC

REG

PROG

CNTL

REG

NOT

USED

NOT

USED

A/D

-

CNTL

A/D

-RESULT

USER

RAM/STACK

USER

PSEUDO

ROM

VECTORS*

(2K MAP)

USER

PSEUDO

ROM

VECTORS*

(4K MAP)

- - - - ON CHIP (M6S705EVM ONLY)

ON

CHIP

WRITE-PROTECTED

DURING

USER PROGRAM

EXECUTION

* For

P3,

at $7FF

For

R3,

U3, at $FFF

For G2, at

$1

FFF

M68705EVM

M1468705EVM

Command

ASM

<addr>

MICROSYSTEMS

_

TABLE 1 - Monitor Command Set

Description

Assembler/Disassembler (Interactive)

BF

<addr1>

<addr2>

<data>

Block

Fill Address Range With Data

BR

[<addr1>[<addr2>[<addr3>]]]

Define Breakpoint(s)

G

[<addr>]

Go

(Execute)

lOAD

[<offset>

]<cmd>

Download

Memory

From

Host

File

MD

<addr1>[<addr2>]

Memory

Display Address Range

MM

<addr>

Memory

Modify

(Interactive)

NOPA Detach

Printer

P

[<count>]

Proceed (From Breakpoint)

PA

Printer Attach

PROG Program EPROM

RD Register Display

READ Read EPROM

RM

Register

Modify

(I

nteractive)

TPlD

[<offset>]

load

Memory

From Cassette Tape

TPDU

<add1> <add2>

Dump

Memory

To Cassette Tape

T

[<count>]

Trace I

nstruction(s)

TM

[<char>]

Enter Transparent

Mode

Mechanical and Environmental Specifications

I

nput

Voltages:

+5

Volts at

1.0

A

±12

Volts at 0.4 A

+27

Volts at 50

mA

(M68705EVM

Programmer

only)

Operating

Frequency: 4.0

MHz

on-board

clock

(1.0

MHz

bus

frequency)

EXT

ClK

range

of

the

MCU

being evaluated

Operating

Environment: O°C to

55°C

Dimensions

(l

x W x H) 9.75 in. x 14.5 in. x 1.2 in. (24.8 cm x 37.8 cm x 3.0 cm)

Ordering Information

Part Number Description

M68705EVM* MC68705P3,

R3,

or

U3 Evaluation

Module

including

User's Manual

M 1468705 EVM * MC1468705G2 Evaluation

Module

including

User's Manual

M68705EVM/D1 M68705 Evaluation

Module

User's Manual

M1468705EVM/D2 M1468705 Evaluation

Module

User's Manual

Options

M68RS232M RS-232C

Adapter

Cable, 3 ft. flat cable; edge

conn.!male

DB25 conn.

M68RS232F RS-232C

Adapter

Cable, 3 ft. flat cable; edge

conn.!female

DB25 conn.

*The

M68705EVM and M1468705EVM are not

processor

interchangeable products.

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.

The

software described herein will

be

provided on

an

"as is" basis and

without

warranty. Motorola accepts no

liability

for

incidental

or

consequential damages arising from use of the software. This disclaimer of warranty extends

to

Motorola's licensee, to li-

censee's transferees and

to

licensee's customers

or

users and

is

in lieu

of

all warranties whether expressed, implied or statutory, including implied

warranties

of

merchantability

or

fitness

for

a

particular

purpose. Motorola and ® are registered trademarks of Motorola, Inc. Motorola, Inc.

is

an

Equal Employment

Opportunity/Affirmative

Action Employer.

_ ®

MOTOROLA

Semiconductor Products Inc.

p.o.

BOX 20912 • PHOENIX, ARIZONA 85036 • A SUBSIDIARY

OF

MOTOROLA

INC.

15542-4

PRINTED IN

USA

6-85

IMPERIAL LITHO

C31475

12,000