mc68hc908mr8 Freescale Semiconductor, Inc, mc68hc908mr8 Datasheet - Page 111

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mc68hc908mr8

Manufacturer Part Number
mc68hc908mr8
Description
M68hc08 Microcontrollers Microcontroller
Manufacturer
Freescale Semiconductor, Inc
Datasheet

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Technical Data — MC68HC908MR8
8.1 Contents
MC68HC908MR8 — Rev 4.1
Freescale Semiconductor
8.2
8.3
8.4
8.4.1
8.4.2
8.4.3
8.4.4
8.5
8.5.1
8.5.2
8.5.3
8.5.4
8.5.5
8.5.6
8.5.7
8.5.8
8.6
8.6.1
8.6.2
8.6.3
8.7
8.8
8.9
8.10
8.11
8.11.1
8.11.2
Section 8. Clock Generator Module (CGM)
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112
Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112
Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . .113
CGM Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .125
Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .132
Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133
CGM During Break Mode . . . . . . . . . . . . . . . . . . . . . . . . . . .133
Acquisition/Lock Time Specifications . . . . . . . . . . . . . . . .134
I/O Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .123
Crystal Oscillator Circuit . . . . . . . . . . . . . . . . . . . . . . . . .113
Phase-Locked Loop Circuit (PLL). . . . . . . . . . . . . . . . . .115
Base Clock Selector Circuit . . . . . . . . . . . . . . . . . . . . . .121
CGM External Connections . . . . . . . . . . . . . . . . . . . . . . .122
CGM External Connections . . . . . . . . . . . . . . . . . . . . . . .122
Crystal Amplifier Output Pin (OSC2) . . . . . . . . . . . . . . .123
External Filter Capacitor Pin (CGMXFC) . . . . . . . . . . . .123
PLL Analog Power Pin (V
Oscillator Enable Signal (SIMOSCEN) . . . . . . . . . . . . . .124
Crystal Output Frequency Signal (CGMXCLK) . . . . . . . 124
CGM Base Clock Output (CGMOUT) . . . . . . . . . . . . . . .124
CGM CPU Interrupt (CGMINT) . . . . . . . . . . . . . . . . . . . . .124
PLL Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . .126
PLL Bandwidth Control Register . . . . . . . . . . . . . . . . . .129
PLL Programming Register. . . . . . . . . . . . . . . . . . . . . . .131
Acquisition/Lock Time Definitions . . . . . . . . . . . . . . . . .134
Parametric Influences on Reaction Time . . . . . . . . . . . .135
Clock Generator Module (CGM)
DDA
) . . . . . . . . . . . . . . . . . . . . .124
Technical Data
111

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