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MC68HC908GZ8VFA Datasheet(PDF) 11 Page - Freescale Semiconductor, Inc

Part # MC68HC908GZ8VFA
Description  M68HC08 Microcontrollers
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MC68HC908GZ8VFA Datasheet(HTML) 11 Page - Freescale Semiconductor, Inc

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Table of Contents
MC68HC908GZ8
Data Sheet
Freescale Semiconductor
Table of Contents
11
7.3.7
Special Programming Exceptions. . . . . . . . . . . . . . . . . . . . . . . . . . . 90
7.3.8
Base Clock Selector Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
7.3.9
CGM External Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
7.4
I/O Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
7.4.1
Crystal Amplifier Input Pin (OSC1) . . . . . . . . . . . . . . . . . . . . . . . . . . 92
7.4.2
Crystal Amplifier Output Pin (OSC2) . . . . . . . . . . . . . . . . . . . . . . . . 92
7.4.3
External Filter Capacitor Pin (CGMXFC) . . . . . . . . . . . . . . . . . . . . . 92
7.4.4
PLL Analog Power Pin (VDDA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
7.4.5
PLL Analog Ground Pin (VSSA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
7.4.6
Oscillator Enable Signal (SIMOSCEN) . . . . . . . . . . . . . . . . . . . . . . . 92
7.4.7
Oscillator Stop Mode Enable Bit (OSCSTOPENB). . . . . . . . . . . . . . 92
7.4.8
Crystal Output Frequency Signal (CGMXCLK). . . . . . . . . . . . . . . . . 93
7.4.9
CGM Base Clock Output (CGMOUT) . . . . . . . . . . . . . . . . . . . . . . . . 93
7.4.10
CGM CPU Interrupt (CGMINT). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
7.5
CGM Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
7.5.1
PLL Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
7.5.2
PLL Bandwidth Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
7.5.3
PLL Multiplier Select Register High . . . . . . . . . . . . . . . . . . . . . . . . . 97
7.5.4
PLL Multiplier Select Register Low . . . . . . . . . . . . . . . . . . . . . . . . . . 98
7.5.5
PLL VCO Range Select Register . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
7.6
Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
7.7
Special Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
7.7.1
Wait Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
7.7.2
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
7.7.3
CGM During Break Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
7.8
Acquisition/Lock Time Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 100
7.8.1
Acquisition/Lock Time Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . 100
7.8.2
Parametric Influences on Reaction Time . . . . . . . . . . . . . . . . . . . . 101
7.8.3
Choosing a Filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Section 8. Configuration Register (CONFIG)
8.1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
8.2
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Section 9. Computer Operating Properly (COP) Module
9.1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
9.2
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
9.3
I/O Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
9.3.1
CGMXCLK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
9.3.2
STOP Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
9.3.3
COPCTL Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
9.3.4
Power-On Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
9.3.5
Internal Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109


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