Sony MDS-S9 Service Manual page 51

Pin No. Pin Name
76 VSS
77 to 85 A17 to A9
86 to 89 SEL1 to SEL4
90 WP
91 VCC
92 A8
93 VSS
94 to 101 A7 to A0
102 to 113 D15 to D4
114
KEYBD-CLKCTL
115
I2CBUSY
116 KEYBD-DAT
117 REC VOL A
118 REC VOL B
119 to 122 D3 to D0
123 JOG0
124 JOG1
125
LATCH
126
REC
127
COAX/OPT
128
FL-CS
129
I2CPOWER
130 VSS
131
STB
132 VCC
133 IOP
134
DESTINATION
135
MODEL
136 BEEP SW
137
KEY3
138 KEY2
139
KEY1
140 AVSS
141
KEY0
142 VREF
143 AVCC
144
NC
I/O
— Ground terminal
O
Address signal output to the flash memory Not used (open)
I Not used (open)
O
Writing protect signal output to the flash memory "L" active Not used (fixed at "L")
— Power supply terminal (+3.3V)
O
Address signal output to the flash memory Not used (open)
— Ground terminal
O
Address signal output to the flash memory Not used (open)
I/O Two-way data bus with the flash memory Not used (open)
O Clock control signal output to the key board Not used (pull down)
I
Busy monitor signal input from the IIC bus
I Serial data input from the key board Not used (fixed at "H")
O Not used (open)
O
Not used (open)
I/O
Two-way data bus with the flash memory Not used (open)
I JOG dial pulse input from the rotary encoder (S713 . AMS >) (A phase input)
I JOG dial pulse input from the rotary encoder (S713 . AMS >) (B phase input)
O
Not used (open)
O
Power on/off control signal output terminal for the beep sound drive Not used (open)
Optical in or coaxial in selection signal output terminal "L": optical in, "H": coaxial in
O
Not used (open)
O
Chip select signal output to the fluorescent indicator tube/LED driver (IC761)
I
Power supply detection signal input from the IIC bus
— Ground terminal
O
Relay drive signal output for the power on/off "L": standby, "H": power on
— Power supply terminal (+3.3V)
I Optical pick-up voltage detection signal input from the automatic power control circuit
I
Destination setting input terminal Fixed at "L" in this set
I
Model setting input terminal Fixed at "M" in this set
I Beep switch input terminal Not used (fixed at "L")
I
Key input terminal (A/D input) Not used (fixed at "H")
Key input terminal (A/D input) S721 to S724 and S726 (INPUT, PLAY MODE, REC MODE,
I
LEVEL/DISPLAY/CHAR, I/1) keys input
Key input terminal (A/D input)
I
S711 to S715 (MENU/NO, YES, PUSH ENTER, CLEAR, Z) keys input
— Ground terminal (for analog system )
I Key input terminal (A/D input) S701 to S705 (z, x, M, m, u) keys input
I Reference voltage (+3.3V) input terminal (for A/D converter)
— Power supply terminal (+3.3V) (for analog system )
O
Not used (pull down)
Description
MDS-S9
51