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MC68HC08AS32FN Datasheet(PDF) 10 Page - Freescale Semiconductor, Inc

Part # MC68HC08AS32FN
Description  Microcontrollers
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MC68HC08AS32FN Datasheet(HTML) 10 Page - Freescale Semiconductor, Inc

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Data Sheet
MC68HC08AS32 — Rev. 4.1
10
Freescale Semiconductor
5.4
I/O Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
5.4.1
Crystal Amplifier Input Pin (OSC1) . . . . . . . . . . . . . . . . . . . . . . . . . . 97
5.4.2
Crystal Amplifier Output Pin (OSC2) . . . . . . . . . . . . . . . . . . . . . . . . 97
5.4.3
External Filter Capacitor Pin (CGMXFC) . . . . . . . . . . . . . . . . . . . . . 98
5.4.4
Analog Power Pin (VDDA/VDDAREF) . . . . . . . . . . . . . . . . . . . . . . . . . 98
5.4.5
Oscillator Enable Signal (SIMOSCEN) . . . . . . . . . . . . . . . . . . . . . . . 98
5.4.6
Crystal Output Frequency Signal (CGMXCLK). . . . . . . . . . . . . . . . . 98
5.4.7
CGM Base Clock Output (CGMOUT) . . . . . . . . . . . . . . . . . . . . . . . . 98
5.4.8
CGM CPU Interrupt (CGMINT). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
5.5
CGM Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
5.5.1
PLL Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
5.5.2
PLL Bandwidth Control Register. . . . . . . . . . . . . . . . . . . . . . . . . . . 100
5.5.3
PLL Programming Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
5.6
Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
5.7
Special Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
5.7.1
Wait Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
5.7.2
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
5.8
CGM During Break Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
5.9
Acquisition/Lock Time Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 104
5.9.1
Acquisition/Lock Time Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . 104
5.9.2
Parametric Influences on Reaction Time . . . . . . . . . . . . . . . . . . . . 105
5.9.3
Choosing a Filter Capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
5.9.4
Reaction Time Calculation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Section 6. Computer Operating Properly (COP)
6.1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
6.2
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
6.3
I/O Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
6.3.1
CGMXCLK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
6.3.2
STOP Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
6.3.3
COPCTL Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
6.3.4
Internal Reset Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
6.3.5
Reset Vector Fetch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
6.3.6
COPD (COP Disable) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
6.3.7
COPS (COP Short Timeout). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
6.4
COP Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
6.5
Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
6.6
Monitor Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
6.7
Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
6.7.1
Wait Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
6.7.2
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
6.8
COP Module During Break Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . 112


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