68HC705JB4 datasheet(127/134 Pages) FREESCALE

127 / 134 page

February 24, 1999

GENERAL RELEASE SPECIFICATION

MC68HC05JB4

MOTOROLA

REV 2

A-1

APPENDIX A

MC68HC705JB4

This

appendix

describes

the

MC68HC705JB4,

the

emulation

part

for

MC68HC05JB4. The

entire

MC68HC05JB4

data

sheet

applies

the

MC68HC705JB4, with exceptions outlined in this appendix.

A.1

INTRODUCTION

The MC68HC705JB4 is an EPROM version of the MC68HC05JB4, and is avail-

able for user system evaluation and debugging. The MC68HC705JB4 is function-

ally identical to the MC68HC05JB4 with the exception of the 3584 bytes user

ROM is replaced by 3584 bytes user EPROM. Also, the mask options available on

the MC68HC05JB4 are implemented using the Mask Option Register (MOR) in

the MC68HC705JB4.

A.2

MEMORY

The MC68HC705JB4 memory map is shown in Figure A-1.

A.3

MASK OPTION REGISTER (MOR)

The Mask Option Register (MOR) is a byte of EPROM used to select the features

controlled by mask options on the MC68HC05JB4. In order to program this regis-

ter the MORON bit in PCR need to be set to “1” before doing the EPROM pro-

gramming process.

COPEN – COP Enable

1 =

COP watchdog function disabled.

0 =

COP watchdog function enabled.

IRQTRIG – IRQ, PA0-PA3 Interrupt Options

1 =

Edge-trigger only.

0 =

Edge-and-level-triggered.

HIGHCURRA – PA6 and PA7 High Current Enable

1 =

High current capability disabled on PA6 and PA7.

0 =

High current capability enabled on PA6 and PA7.

BIT 7

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

MOR

COPEN

IRQTRIG HIGHCURRA PAINTEN

OSCDLY

LVREN

$007F

reset:

00111111

Freescale Semiconductor, Inc.

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