
M68HC08
Microcontrollers
freescale.com
MC68HC908GP32
MC68HC08GP32
Data Sheet
MC68HC908GP32
Rev. 7
03/2006


MC68HC908GP32 • MC68HC08GP32 Data Sheet, Rev. 7
Freescale Semiconductor 3
Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc.
This product incorporates SuperFlash® technology licensed from SST.
© Freescale Semiconductor, Inc., 2001, 2006. All rights reserved.
MC68HC908GP32
MC68HC08GP32
Data Sheet
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Revision History
MC68HC908GP32 • MC68HC08GP32 Data Sheet, Rev. 7
4 Freescale Semiconductor
The following revision history table summarizes changes contained in this document. For your
convenience, the page number designators have been linked to the appropriate location.
Revision History
Date
Revision
Level
Description
Page
Number(s)
July,
2001
5
In Table 15-1, second cell in "Comment" column, corrected PTC to
PTC1.
199
In Figure 21-2, Timebase control register, bit 0 is a reserved bit. 337
Updated crystal oscillator component values in 23.17.1 CGM
Component Specifications.
387
Added appendix A: MC68HC08GP32 — ROM part. 397
August,
2002
6
Section 22. Timer Interface Module (TIM) — Timer discrepancies
corrected throughout this section.
341
Section 24. Mechanical Specifications — Replaced incorrect 44-pin QFP
drawing, case 824E to case 824A.
393
August,
2005
6.1 Updated to meet Freescale identity guidelines. Throughout
March,
2006
7
3.5 Clock Generator Module (CGM) — Updated description to remove
erroneous information.
38
23.16.1 CGM Component Specifications — Updated to reflect correct
values.
260

MC68HC908GP32 • MC68HC08GP32 Data Sheet, Rev. 7
Freescale Semiconductor 5
List of Chapters
Chapter 1 General Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Chapter 2 Memory Map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Chapter 3 Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Chapter 4 Resets and Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Chapter 5 Analog-to-Digital Converter (ADC). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Chapter 6 Break Module (BRK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
Chapter 7 Clock Generator Module (CGMC). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
Chapter 8 Configuration Register (CONFIG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87
Chapter 9 Computer Operating Properly (COP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91
Chapter 10 Central Processor Unit (CPU). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95
Chapter 11 FLASH Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107
Chapter 12 External Interrupt (IRQ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .115
Chapter 13 Keyboard Interrupt Module (KBI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .119
Chapter 14 Low-Voltage Inhibit (LVI). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .125
Chapter 15 Monitor ROM (MON) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .129
Chapter 16 Input/Output (I/O) Ports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .141
Chapter 17 Random-Access Memory (RAM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .157
Chapter 18 Serial Communications Interface Module (SCI) . . . . . . . . . . . . . . . . . . . . . . .159
Chapter 19 System Integration Module (SIM). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .185
Chapter 20 Serial Peripheral Interface Module (SPI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .203
Chapter 21 Timebase Module (TBM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .223
Chapter 22 Timer Interface Module (TIM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .227
Chapter 23 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .243
Chapter 24 Mechanical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .263
Chapter 25 Ordering Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .271
Appendix A MC68HC08GP32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .273