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Freescale Semiconductor
Engineering Bulletin
EB674
Rev. 2, 02/2007
Contents
© Freescale Semiconductor, Inc., 2007. All rights reserved.
1 Introduction
This engineering bulletin describes the
MC68HC08QTx/QYx (ROM QYx). The 08QTx/QYx is
a read only memory version of the Q family series of
devices (referred to as the QY Classic in this document).
Customer requests have led to the advanced design of the
ROM QYx that has added adaptability, new features, and
contains lead-free packaging.
This document:
• Provides information needed to convert from
QY Classic to the ROM QYx
• Highlights the benefits of making this change
Sections:
• Benefits of the Enhanced ROM QYx
• Conversion Considerations
• Code Changes Checklist
• Development Tools
• Differences in Packaging
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2 Benefits of the Enhanced ROM QYx. . . . . . . . . . . . . . . . 2
2.1 New Analog-to-Digital Converter Module (ADC) . . . 2
2.2 Enhanced Oscillator Module (OSC) . . . . . . . . . . . . 3
2.3 Improved Auto Wakeup Module (AWU) . . . . . . . . . 4
2.4 New Power-on Reset Module (POR). . . . . . . . . . . . 5
2.5 Keyboard Interface Module (KBI) Functionality . . . . 5
2.6 Operating Voltage Range . . . . . . . . . . . . . . . . . . . . 5
3 Conversion Considerations . . . . . . . . . . . . . . . . . . . . . . . 6
4 Code Changes Checklist. . . . . . . . . . . . . . . . . . . . . . . . . 6
5 Development Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6 Differences in Packaging. . . . . . . . . . . . . . . . . . . . . . . . . 7
MC68HC08QTx/QYx Conversion
Guidelines
by: Donnie Garcia
Applications Engineering
