Pioneer FX-MG8517ZT/UC, Service Manual

Page: 102 / 112

102
FX-MG8517ZT,MG8817ZT
*PD5715A
1
20
21
40
41
60
61
80
Format Meaning
C C MOS
Pin No. Pin Name I/O Format Function and Operation
70 NC Not used
71 VCC VDD
72 VREF I A/D converter reference voltage input
73 AVSS A/D GND
74 ADRMON I The remainder amount address monitor input
75 EREF DRAM A/D reference voltage output
76 PH1 I Disc photo sense input 1
77 PH2 I Disc photo sense input 2
78 PH3 I Disc photo sense input 3
79 ELVSNS I ELV position photo sense input
80 TEMP I Temperature detector input
*LC75804W
25
26
50
51
75
76
100
1
-
Pin Functions (LC75804W)
Pin No. Pin Name I/O Function and Operation
1–73 SEG01–73 O LCD segment signal output
74–77 COM4–1 O LCD common signal output
78,79 SEG75,76 Not used
80–83 KS3–6 Not used
84–88 KI1–5 I Key scan input
89 VDD Power supply
90 VLCD Power supply for LCD driver
91 VLCD1 I LCD drive bias impressed voltage (2/3) input
92 VLCD2 I LCD drive bias impressed voltage (1/3) input
93 VSS GND
94 TEST GND
95 OSC I/O Oscillator terminal
96
res
I Reset signal input
97 DO Not used
98 CE I Chip enable input
99 CL I Synchronizing clock input
100 DI I Transfer data input