MC68HC08AZ32A Datasheet, PDF (55/456 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Technical Data — MC68HC08AZ32A
Section 4. ROM
4.1 Contents
4.2 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
4.3 Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
4.4 Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
4.2 Introduction
This section describes the operation of the embedded ROM memory.
4.3 Functional Description
The user ROM consists of up to 32, 256 bytes from addresses
$8000–$FDFF. The monitor ROM and vectors are located from
$FE20–$FF5F.
Fifty-two user vectors, $FFCC–$FFFF, are dedicated to user-defined
reset and interrupt vectors.
4.4 Security
Security has been incorporated into the MC68HC08AZ32A to prevent
external viewing of the ROM contents⁽¹⁾. This feature is selected by a
mask option and ensures that customer-developed software remains
propriety. See Mask Options on page 145.
1. No security feature is absolutely secure. However, Motorola’s strategy is to make reading or
copying the ROM difficult for unauthorized users.
MC68HC08AZ32A — Rev 1.0
MOTOROLA
ROM
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Technical Data
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