Read Sony SRF-DR2000 Service Manual online
– 10 –
Pin No.
Pin name
I/O
Description
69
A15
O
Address bus output to external memory.
70
A16
O
Address bus output to external memory.
71, 72
–
Not used (Open).
73
CS DEC
O
Chip select output to decoder (IC204).
74
CS RAM
O
Chip select output to RAM (IC202).
75
CS ROM
O
Chip select output to ROM (IC203).
76
DEC RES
O
Reset signal output to decoder (IC204).
77 - 78
–
Not used (Open).
_______
81
RESET
O
Reset signal output to DE-SCRAMBLE MICOM (IC301).
82
DD RDY
I
De-scramble end signal input.
83
CLK
O
Clock output to DE-SCRAMBLE MICOM (IC301).
84
DI
O
Data output to DE-SCRAMBLE MICOM (IC301).
85
DO
I
Data input from DE-SCRAMBLE MICOM (IC301).
86
INT
O
De-scramble request signal output.
87
POWER
O
Radio power supply ON/OFF control. “H” : Radio power ON
88
(+)
I
Tune (+) key input.
89
SRAM CHECK
I
SRAM check terminal.
90
A0 LCD
O
Communications with LCD module.
91
CS LCD
O
Communications with LCD module.
92
RES LCD
O
Communications with LCD module.
93
VDD
–
Power supply (+3V).
94
GND
–
Ground.
95
VDET
I
Low voltage (1.9V) DET. “L” : power OFF
96
POWER SW
I
Power ON/OFF key input.
97
EXT (IN)
I
External (Beep) signal input.
98
DATA LCD
O
Serial data output to LCD module.
99
EXT (OUT)
O
External (Beep) signal output.
100
SCL LCD
O
Serial clock output to LCD module.
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