MC68HC908JW32_09 Datasheet, PDF (58/232 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

Clock Generator Module (CGM)
OSC2
OSC1
OSCILLATOR (OSC) MODULE
INTERNAL RC OSC
ICLK
XTAL OSC
CGMXCLK
CGMRCLK
To Timebase Module (TBM)
To SIM
SIMOSCEN
From SIM
PHASE-LOCKED LOOP (PLL)
÷2
CGMRDV
REFERENCE
DIVIDER
CGMRCLK
R
RDS[3:0]
V_DD
CGMXFC
BCS
CLOCK
SELECT
CIRCUIT
A
B¹ _S*
*WHEN S = 1,
V_SS
CGMOUT = B
VPR[1:0]
VRS[7:0]
L
2^E
÷3
CGMOUT
To SIM
SIMDIV2
From SIM
PHASE
DETECTOR
LOOP
FILTER
VOLTAGE
CONTROLLED
OSCILLATOR
PLL ANALOG
CGMVCLK
To USB
LOCK
DETECTOR
AUTOMATIC
MODE
CONTROL
INTERRUPT
CONTROL
CGMINT
To SIM
LOCK
AUTO ACQ
PLLIE PLLF
MUL[11:0]
N
PRE[1:0]
2^P
CGMVDV
FREQUENCY
DIVIDER
CGMPCLK
FREQUENCY
DIVIDER
Figure 5-1. CGM Block Diagram
MC68HC908JW32 Data Sheet, Rev. 6
58
Freescale Semiconductor