Pioneer KEH-P2800 Service Manual - Page 36

Pin Functions PD6293A

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KEH-P2800,P3850 *PE5015A 80 1 61 60 20 21 41 40 Format C Meaning C MOS IC's marked by* are MOS type. Be careful in handling them because they are very liable to be damaged by electrostatic induction. - Pin Functions (PD6293A) Pin No. Pin Name I/O 1-5 SEG4-0 O 6-8 COM1-3 O 9 COM0 O 10 LCDB 11-14 KS3-0 O 15,16 KDT0,1 I 17 REM I 18 DPDT I 19 NC 20 KYDT O 21 MODA 22 X0 23 X1 24 VSS 25,26 KDT2,3 I 27,28 KST5,4 O 29-55 SEG39-13 O 56 VCC 57-64 SEG12-5 O Function and Operation LCD segment output 4-0 Common driver output 1-3 Common driver output 0 LCD bias power supply Key strobe output 3-0 Key data input 0,1 Remote control reception Display data input Not used Key data output GND Crystal oscillator connection pin Crystal oscillator connection pin GND Key data input 2,3 Key strobe output 5,4 LCD segment output 39-13 5V LCD segment output 12-5 *PD6293A 48 33 32 49 17 64 16 1 36

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36
KEH-P2800,P3850
-
Pin Functions (PD6293A)
Pin No.
Pin Name
I/O
Function and Operation
1–5
SEG4-0
O
LCD segment output 4-0
6–8
COM1-3
O
Common driver output 1-3
9
COM0
O
Common driver output 0
10
LCDB
LCD bias power supply
11–14
KS3-0
O
Key strobe output 3-0
15,16
KDT0,1
I
Key data input 0,1
17
REM
I
Remote control reception
18
DPDT
I
Display data input
19
NC
Not used
20
KYDT
O
Key data output
21
MODA
GND
22
X0
Crystal oscillator connection pin
23
X1
Crystal oscillator connection pin
24
VSS
GND
25,26
KDT2,3
I
Key data input 2,3
27,28
KST5,4
O
Key strobe output 5,4
29–55
SEG39-13
O
LCD segment output 39-13
56
VCC
5V
57–64
SEG12-5
O
LCD segment output 12-5
IC's marked by* are MOS type.
Be careful in handling them because they are very
liable to be damaged by electrostatic induction.
80
1
20
21
40
41
60
61
*PE5015A
Format
Meaning
C
C MOS
*PD6293A
49
48
33
32
17
16
1
64