MC68HC708XL36 FREESCALE [Freescale Semiconductor, Inc], MC68HC708XL36 Datasheet - Page 84

• Manufacturer Part Number: MC68HC708XL36
• Description: HCMOS Microcontroller Unit
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

CGM
Introduction
MC68HC708XL36
84
Low-Power Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105
CGM During Break Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106
Acquisition/Lock Time Specifications . . . . . . . . . . . . . . . . . . . . . . . .106
The CGM generates the crystal clock signal, CGMXCLK, which operates
at the frequency of the crystal. The CGM also generates the base clock
signal, CGMOUT, from which the system clocks are derived. CGMOUT
is based on either the crystal clock divided by two or the phase-locked
loop (PLL) clock, CGMVCLK, divided by two. The PLL is a frequency
generator designed for use with 1-MHz to 16-MHz crystals or ceramic
resonators. The PLL can generate an 8-MHz bus frequency without
using a 32-MHz crystal.
Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105
Stop Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105
Acquisition/Lock Time Definitions . . . . . . . . . . . . . . . . . . . . . . . . .106
Parametric Influences on Reaction Time . . . . . . . . . . . . . . . . . . .108
Choosing a Filter Capacitor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109
Reaction Time Calculation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
CGM
MOTOROLA
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