|
MC68HC08AZ16 Datasheet, PDF (98/527 Pages) Motorola, Inc – HCMOS Microcontroller Unit | |||
|
◁ |
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)
MC68HC08AZ32
97
|
▷ |