MC68HC908AP16CFA MOTOROLA [Motorola, Inc], MC68HC908AP16CFA Datasheet - Page 105

• Manufacturer Part Number: MC68HC908AP16CFA
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

8.3.1 Oscillator Module
8.3.2 Phase-Locked Loop Circuit (PLL)
8.3.3 PLL Circuits
MC68HC908AP Family — Rev. 2.5
MOTOROLA
The oscillator module provides two clock outputs CGMXCLK and
CGMRCLK to the CGM module. CGMXCLK when selected, is driven to
SIM module to generate the system bus clock. CGMRCLK is used by the
phase-lock-loop to provide a higher frequency system bus clock. The
oscillator module also provides the reference clock for the timebase
module (TBM). See
circuit description. See
detailed description on TBM.
The PLL is a frequency generator that can operate in either acquisition
mode or tracking mode, depending on the accuracy of the output
frequency. The PLL can change between acquisition and tracking
modes either automatically or manually.
The PLL consists of these circuits:
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Freescale Semiconductor, Inc.
For More Information On This Product,
Reference divider
Frequency pre-scaler
Voltage-controlled oscillator (VCO)
Modulo VCO frequency divider
Phase detector
Loop filter
Lock detector
Go to: www.freescale.com
Section 7. Oscillator (OSC)
Section 12. Timebase Module (TBM)
Clock Generator Module (CGM)
for detailed oscillator
Functional Description
Data Sheet
for
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