MC68HC908LJ24 Datasheet, PDF (112/464 Pages) Motorola, Inc – Microcontrollers

Clock Generator Module (CGM)
SIMOSCEN
From SIM
OSCILLATOR (OSC) MODULE
See Section 7. Oscillator (OSC).
INTERNAL RC OSC
ICLK
To SIM (and COP)
OSC2
OSC1
CRYSTAL OSCILLATOR
CGMXCLK
CGMRCLK
PHASE-LOCKED LOOP (PLL)
CGMRDV
REFERENCE
DIVIDER
CGMRCLK
R
RDS[3:0]
V_DDA CGMXFC V_SSA
RESET: A
A
B¹ _S
BCS
CGMPCLK
VPR[1:0]
VRS[7:0]
L
2^E
T0 RTC, ADC, LCD
USER MODE:
CGMOUT = B
RESET: A
÷2 A
B¹ _S
A
B¹ _S
BASE
CLOCK
SELECT
CIRCUIT
CGMOUT
To SIM
SIMDIV2
From SIM
DIV2CLK
CONFIG2
PHASE
DETECTOR
LOOP
FILTER
VOLTAGE
CONTROLLED
OSCILLATOR
PLL ANALOG
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
FREQUENCY
DIVIDER
CGMVCLK
CGMPCLK
Figure 8-1. CGM Block Diagram
Data Sheet
112
Clock Generator Module (CGM)
MC68HC908LJ24/LK24 — Rev. 2.1
Freescale Semiconductor