HC705E5GRSSLASHD datasheet(107/148 Pages) NXP

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MC68HC705E5 — Rev. 1.0

General Release Specification

User EPROM

General Release Specification — MC68HC705E5

Section 13. User EPROM

13.1 Contents

13.2

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

13.3

Bootloader Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107

13.4

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

13.5

Mask Option Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .113

13.2 Introduction

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.

All of the user vectors, $1FF2 through $1FFF, are dedicated to reset and

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

13.3 Bootloader Mode

Bootloader mode is entered upon the rising edge of RESET if the IRQ is

at VTST and the PB1 pin is at logic 1. The bootloader code resides in the

ROM from $1F01 to $1FEF. This program handles copying of user code

from an external EPROM into the on-chip EPROM. The bootload

function does not have to be done from an external EPROM, but it may

be done from a host.

The user code must be a one-to-one correspondence with the internal

EPROM addresses.

NOTE:

The MCU designer must disable the COP hardware in bootloader mode.

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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