MC68HC812A4 Datasheet, PDF (168/342 Pages) Motorola, Inc – 16-bit device composed of standard on-chip peripheral modules connected by an intermodule bus. Modules include

Phase-Lock Loop (PLL)
11.3 Block Diagram
XTAL PIN
EXTAL PIN
OSCILLATOR
RDV[11:0]
REFERENCE
DIVIDER
f_Reference
OUT-OF-LOCK
DETECTOR
LCKF
V_DDPLL
LOOP FILTER ^RS
SEE Table 11-1 _CS
PHASE
DETECTOR
UP
DOWN
C_P
XFC
PIN
CHARGE
PUMP
f_Loop
PLLON
VCO
LOOP
DIVIDER
LDV[11:0]
DIVIDE BY TWO
TO MODULES
TO MPU
ECLK
PCLK
ECLK & PCLK
GENERATOR
MCLK MODULE CLOCK
DIVIDER
TO CPU
TCLK
TCLK
GENERATOR
MCS[B:A]
Figure 11-1. PLL Block Diagram
PLLS
MUX
MUXCLK
SYSCLK
BASE CLOCK
DIVIDER
BCS[C:B:A]
MC68HC812A4 — Rev. 3.0
168
Phase-Lock Loop (PLL)
Advance Information
MOTOROLA