MC908AP8CFBE Datasheet, PDF (80/324 Pages) Freescale Semiconductor, Inc – Microcontrollers

Clock Generator Module (CGM)
OSC2
OSC1
OSCSEL[1:0]
OSCCLK[1:0]
SIMOSCEN
From SIM
OSCILLATOR (OSC) MODULE
See Chapter 5 Oscillator (OSC).
ICLK
INTERNAL OSCILLATOR
OSCCLK
RC OSCILLATOR
MUX ^CGMXCLK
CRYSTAL OSCILLATOR
CGMRCLK
PHASE-LOCKED LOOP (PLL)
To SIM (and COP)
To Timebase Module (TBM)
To ADC
CGMRDV
REFERENCE
DIVIDER
CGMRCLK
R
RDS[3:0]
V_DDA CGMXFC
BCS
CLOCK
SELECT
CIRCUIT
A
÷ 2 _B¹ _S*
V_SSA
*WHEN S = 1,
CGMOUT = B
VPR[1:0]
VRS[7:0]
L
2^E
CGMPCLK
PHASE
DETECTOR
LOOP
FILTER
VOLTAGE
CONTROLLED
OSCILLATOR
PLL ANALOG
LOCK
DETECTOR
AUTOMATIC
MODE
CONTROL
INTERRUPT
CONTROL
CGMOUT
To SIM
SIMDIV2
From SIM
CGMINT
To SIM
LOCK
AUTO ACQ
PLLIE PLLF
MUL[11:0]
N
PRE[1:0]
2^P
CGMVDV
FREQUENCY
DIVIDER
FREQUENCY
DIVIDER
CGMVCLK
Figure 6-1. CGM Block Diagram
MC68HC908AP Family Data Sheet, Rev. 4
80
Freescale Semiconductor