mc68hc908rf2 Freescale Semiconductor, Inc, mc68hc908rf2 Datasheet - Page 65

• Manufacturer Part Number: mc68hc908rf2
• Description: M68hc08 Microcontrollers Microcontroller / Transmitter
• Manufacturer: Freescale Semiconductor, Inc

Data Sheet — MC68HC908RF2
6.1 Introduction
6.2 Features
6.3 Functional Description
MC68HC908RF2 — Rev. 4.0
MOTOROLA
The internal clock generator module (ICG) is used to create a stable clock source
for the microcontroller without using any external components. The ICG generates
the oscillator output clock (CGMXCLK), which is used by the COP, LVI, and other
modules. The ICG also generates the clock generator output (CGMOUT), which is
fed to the system integration module (SIM) to create the bus clocks. The bus
frequency will be one-fourth the frequency of CGMXCLK and one-half the
frequency of CGMOUT.
The ICG has these features:
The ICG, shown in
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External clock generator, either 1-pin external source or 2-pin crystal
Internal clock generator with programmable frequency output in integer
multiples of a nominal frequency (307.2 kHz ±25 percent)
Frequency adjust (trim) register to improve variability to ±2 percent
Bus clock software selectable from either internal or external clock
Clock monitor for both internal and external clocks
Clock enable circuit
Internal clock generator
External clock generator
Clock monitor circuit
Clock selection circuit
Freescale Semiconductor, Inc.
For More Information On This Product,
Internal Clock Generator Module (ICG)
Section 6. Internal Clock Generator Module (ICG)
Go to: www.freescale.com
Figure
6-1, contains these major submodules:
Data Sheet
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