Pll system : sa7025dk (tx-rx unit ic11), Semiconductor data, Block diagram ■ pin description – Kenwood TK-480 User Manual
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TK-480/481
SEMICONDUCTOR DATA
PLL System : SA7025DK (TX-RX Unit IC11)
■ Block diagram
■ Pin description
Pin No.
Symbol
Description
1
CLOCK
Serial clock input.
2
DATA
Serial data input.
3
STROBE
Serial strobe input.
4
V
SS
Digital ground.
5
RF
IN
Prescaler positive input.
6
RF
IN
Prescaler negative input.
7
V
CCP
Prescaler positive supply voltage. This pin supplies power to the prescaler and RF input buffer.
8
REF
IN
Reference divider input.
9
RA
Auxiliary current setting; resistor to V
SSA
.
10
AUX
IN
Auxiliary divider input.
11
PHA
Auxiliary phase detector output.
12
V
SSA
analog ground.
13
PHI
Integral phase detector output.
14
PHP
Proportional phase detector output.
15
V
DDA
Analog supply voltage. This pin supplies power to the charge pumps, Auxiliary prescaler, Auxiliary and Reference buffers.
16
RN
Main current setting; resistor to V
SSA
.
17
RF
Fractional compensation current setting; resistor to V
SSA
.
18
LOCK
Lock detector output.
19
TEST
Test pin; connect to V
DD
.
20
V
DD
Digital supply voltage. This pin supplies power to the CMOS digital part of the device.
CLOCK
DATA
STROBE
64/65/72
Prescaler
Main dividers
PR
NM1
NM2
NM3
12
8
2
2
FB
EM
Fractional
accumulator
FMOD
NF
3
Prescaler
modulus control
FB
Main phase
detector
Normal output
charge pump
Reference divider
ч
2
ч
2
ч
2
Main
reference
select
EM
EM
÷
EA
NR
12
SM
2
Auxiliary
reference
select
SA
2
Auxiliary
phase
detector
EA
EA
1/4
Prescaler
Auxiliary divider
PA
NA
12
Auxiliary output
charge pump
Integral output
charge pump
Speed-up
output
charge pump
2
FRD
CN
8
CL
2
CK
4
Serial input + Program latches
RF
IN
RF
IN
TEST
Vss
REF
IN
V
CCP
AUX
IN
V
DDA
V
SSA
V
DD
RF
RN
PHP
PHI
RA
PHA
LOCK