MC68HC08AZ0 Datasheet, PDF (111/444 Pages) Motorola, Inc – Advance Information

Freescale Semiconductor, Inc.
Clock Generator Module (CGM)
Functional description
Functional description
The CGM consists of three major submodules:
• Crystal oscillator circuit which generates the constant crystal
frequency clock, CGMXCLK.
• Phase-locked loop (PLL) which generates the programmable
VCO frequency clock CGMVCLK.
• Base clock selector circuit; this software-controlled circuit selects
either CGMXCLK divided by two or the VCO clock CGMVCLK
divided by two, as the base clock CGMOUT. The SIM derives the
system clocks from CGMOUT.
Figure 1 shows the structure of the CGM.
3-cgm
MOTOROLA
Clock Generator Module (CGM)
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MC68HC08AZ0
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