MC68HC708AS48 FREESCALE [Freescale Semiconductor, Inc], MC68HC708AS48 Datasheet - Page 97
MC68HC708AS48
Manufacturer Part Number
MC68HC708AS48
Description
Advance Information
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
1.MC68HC708AS48.pdf
(396 pages)
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8.1 Contents
MC68HC708AS48
MOTOROLA
Advance Information — MC68HC708AS48
—
Rev. 4.0
Section 8. Clock Generator Module (CGM)
8.2
8.3
8.4
8.4.1
8.4.2
8.4.2.1
8.4.2.2
8.4.2.3
8.4.2.4
8.4.2.5
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
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99
I/O Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109
CGM Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .111
Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .117
Crystal Oscillator Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . .99
Phase-Locked Loop Circuit (PLL) . . . . . . . . . . . . . . . . . . .101
Base Clock Selector Circuit. . . . . . . . . . . . . . . . . . . . . . . .107
CGM External Connections. . . . . . . . . . . . . . . . . . . . . . . .108
Crystal Amplifier Input Pin (OSC1) . . . . . . . . . . . . . . . . . .109
Crystal Amplifier Output Pin (OSC2) . . . . . . . . . . . . . . . . .109
External Filter Capacitor Pin (CGMXFC). . . . . . . . . . . . . .109
Analog Power Pin (V
Oscillator Enable Signal (SIMOSCEN) . . . . . . . . . . . . . . .110
Crystal Output Frequency Signal (CGMXCLK) . . . . . . . . .110
CGM Base Clock Output (CGMOUT) . . . . . . . . . . . . . . . .110
CGM CPU Interrupt (CGMINT) . . . . . . . . . . . . . . . . . . . . .110
PLL Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112
PLL Bandwidth Control Register . . . . . . . . . . . . . . . . . . . .114
PLL Programming Register . . . . . . . . . . . . . . . . . . . . . . . .116
Clock Generator Module (CGM)
Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .101
Acquisition and Tracking Modes . . . . . . . . . . . . . . . . . .103
Manual and Automatic PLL Bandwidth Modes . . . . . . .103
Programming the PLL . . . . . . . . . . . . . . . . . . . . . . . . . .105
Special Programming Exceptions . . . . . . . . . . . . . . . . .107
DDA
/V
DDAREF
). . . . . . . . . . . . . . . . . .110
Advance Information
97
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