Pioneer KEH-P900R Service Manual page 47

QQ
3 7 63 1515 0
- Pin Functions (PD6278C)
Pin No. Pin Name
1-5 SEG4-0
6-9 COM3-0
10 V3
11-14 KS4-1
15,16 KD1,2
17 REM
18 RXD
rst
19
20 TXD
21 MODA
22 X0
23 X1
24 VSS
25,26 KD3,4
27,28 KS6,5
29-55 SEG39-13
56 VCC
57-64 SEG12-5
*PD6278C
64
1
TE
L 13942296513
16
17
www
.
http://www.xiaoyu163.com
I/O Function and Operation
O LCD segment output
O LCD common output
LCD drive power supply
O Key strobe output
I Key data input (analogue input)
I Remote control reception
I System micro computer UART communication data input
I System reset
O System micro computer UART communication data output
GND
Crystal oscillator connection pin
Crystal oscillator connection pin
GND
I Key data input
O Key strobe output
O LLCD segment output
Power supply
O LCD segment output
49
48
33
32
x ao u163
y
i
http://www.xiaoyu163.com
KEH-P5900R,P4900R,P4930R
2 9
8
Q Q
3 6 7 1 3 1 5
co
.
9 4 2 8
0 5 8 2 9 9 4 2 8
m
9 9
9 9
47