Sony DPS-V77 Service Manual page 23

Pin No. Pin name I/O Description
66 EXTAL 0
System clock. (lOMHz)
67
XTAL I
System clock. (lOMHz)
68 Vee - Power supply.
69 AS
0 Not used.
70 RD 0
Lead signal output to digital meter (lC605), gate alley (lC606), master program ROM (lC607)
and master RAM (lC608, 609)
71 HWR 0
Upper rank byte light output to the digital meter (IC605), gate array (IC606), master RAM
(lC608,609).
72 LWR 0 Not used.
73 MDO I Operation mode select input. (Fixed "H" level)
74 MDI I Operation mode select input. (Fixed "H" level)
75 MD2 I Operation mode select input. (Fixed "L" level)
76 AVee
-
AID converter power supply. (+5V)
77 VREF I Reference voltage input to AID converter.
78 ANO I Battery input terminal.
79 ANI I Error condition input from digital input IC (IC90l).
80
AN2 I FREQ REPORT 0 input from digital input IC (IC90l).
81 AN3 I FREQ REPORT 1 input from digital input IC (lC90l).
82 AN4
I
FREQ REPORT 2 input from digital input IC (lC90l).
83 AN5 I ERROR FLAG input from digital input IC (lC90l).
84 AN6 I Padal switch 2 input terminal.
85 AN7 I Padal switch 1 input terminal.
86 AVss
-
GND (AID converter)
87 IRQO I Interrupt request signal input from LCD controller (lC6l0).
88
P8I 0 Conditional jump output to DSP (lC602).
89
P82 0 Conditional jump output to DSP (lC604).
90
CSI 0 Address data output to gate alley (lC606).
91
CSO 0 Chip enable output to EEPROM (lC607).
92 Vss
-
GND
93
PAO 0 LCD data output.
94
PAl 0 LCD data output.
95
PA2 0 LCD data output.
96
PA3 0 Clock change signal output.
97
PA4 0 LCD data output.
98 PAS 0
Latch output to
0/
A converter.
99
PA6 0
MIDI THRU/OUT change signal output.
100 A20
0 Not used.
- 23-