HC705CT4GRSSLASHD datasheet(107/152 Pages) NXP

107 / 152 page

MC68HC705CT4 — Rev. 2.0

General Release Specification

MOTOROLA

EPROM

107

General Release Specification — MC68HC705CT4

Section 15. EPROM

15.1 Contents

15.2

Introduction .............................................................................107

15.3

EPROM...................................................................................107

15.4

Bootloader Mode ....................................................................108

15.4.1

Bootloader Functions ........................................................108

15.4.2

Programming Register ......................................................112

15.4.3

Mask Option Register........................................................114

15.2 Introduction

This section describes erasable programmable read-only memory

(EPROM) programming.

15.3 EPROM

The user EPROM consists of 5120 bytes of EPROM from $0B00 to

$1EFF and 16 bytes of user vectors from $1FF0 to $1FFF.

The bootloader ROM and vectors are located from $1F01 to $1FEF.

Twelve of the user vectors, $1FF4 thorough $1FFF, are dedicated to

reset and interrupt vectors. The four remaining locations, $1FF0, $1FF1,

$1FF2 and $1FF3, are general-purpose user EPROM locations.

Location $1F00 is the mask option register (MOR).

The contents of the EPROM cannot be prevented from being viewed

externally, since security is not incorporated into the MC68HC705CT4.

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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