MC68HC08AZ60A Datasheet, PDF (57/480 Pages) Motorola, Inc – Microcontrollers

Advance Information — MC68HC08AZ60A
Section 4. ROM
4.1 Contents
4.2 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
4.3 Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
4.4 Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
4.2 Introduction
This section describes the operation of the embedded ROM memory.
4.3 Functional Description
The user ROM consists of up to 61,744 bytes located in address ranges
$0450–-$04FF, $0580–-$05FF and $0E00–$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 MC68HC08AZ60A to prevent
external viewing of the ROM contents⁽¹⁾. This feature is selected by a
mask option and ensures that customer-developed software remains
proprietary. See Mask Options on page 167.
1. No security feature is absolutely secure. However, Motorola’s strategy is to make reading or
copying the ROM difficult for unauthorized users.
MC68HC08AZ60A — Rev 0.0
MOTOROLA
ROM
Advance Information
57