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XIN
XOUT
FMIN
AMIN
CE
DI
CL
DO
VDD
VSS
BO1 BO2
BO3
BO4
IO1
IO2
IFIN
AOUT
AIN
PD
UNIVERSAL
COUNTER
UNLOCK
DETECTOR
PHASE DETECTOR
CHARGE PUMP
REFERENCE
DIVIDER
SWALLOW COUNTER
1/16, 1/17 4bits
12bits PROGRAMMABLE
DIVIDER
DATA SHIFT REGISTER
LATCH
POWER
ON
RESET
CCB
I/F
1
2
LC72131, 72131M
VDD
Ko 0
Ko 7
OSC1
OSC2
Oscillator
Divider
Decoder
Output
circuit
Key
output
timing
signal
generator
VDD
TEST
VSS
VDD
OUT
Fosc/12
LC7461M
KI 0
Key
entry
circuit
Key data
register
Custom code
register
KI 3
CO
C5
11