Pioneer DEH-P4950MP/XU/CN5 Service Manual page 57

5
- Pin Functions (PD6538A)
Pin No. Pin Name
1-39 SEG38-0
40-43 COM3-0
44-46 V1-3
47 VCC
48 NC
49 TXD
50 RXD
51,52 MOD0,1
53 RESET
54,55 X0,1
56 VSS
57 REM
58,59 NC
60-63 KDT4-1
64-69 KST6-1
70-100 SEG69-39
PD6538A
1
25
GP1UX51RK
- Block Diagram
Amp Limiter
5
6
I/O Format Function and Operation
LCD segment output
O
O LCD common output
LCD drive power supply
O
Power supply
O
Not used
Communication data output
O C
I C Communication data input
Not used
Reset
Crystal oscillator connection pin
Not used
Remote control input
I C
Not used
O C Key data 4-1 output
Key strobe 6-1 output
O N
LCD segment output
O
75
51
B.P.F Demodulato Integrator Comparator
DEH-P4950MP/XU/CN5
6
7
Format
C
N
- Pin Layout
RL
2 3 1
GND VCC vout
7
8
Meaning
CMOS
Nch open drain
1 2 3
vout GND VCC
57
8
A
B
C
D
E
F