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57
MDS-S50
Pin No.
Pin Name
I/O
Description
76
VSS
—
Ground terminal
77 to 85
A17 to A9
O
Address signal output to the flash memory Not used (open)
86 to 89
SEL1 to SEL4
I
Not used (open)
90
WP
O
Writing protect signal output to the flash memory “L” active Not used (fixed at “L”)
91
VCC
—
Power supply terminal (+3.3V)
92
A8
O
Address signal output to the flash memory Not used (open)
93
VSS
—
Ground terminal
94 to 101
A7 to A0
O
Address signal output to the flash memory Not used (open)
102 to 113
D15 to D4
I/O
Two-way data bus with the flash memory Not used (open)
114
KEYBD-CLKCTL
O
Clock control signal output to the key board Not used (fixed at “L”)
115
I2CBUSY
I
Busy monitor signal input from the IIC bus
116
KEYBD-DAT
I
Serial data input from the key board Not used (fixed at “H”)
117
REC VOL A
O
Not used (open)
118
REC VOL B
O
Not used (open)
119 to 122
D3 to D0
I/O
Two-way data bus with the flash memory Not used (open)
123
JOG0
I
JOG dial pulse input from the rotary encoder (S713 . AMS >) (A phase input)
124
JOG1
I
JOG dial pulse input from the rotary encoder (S713 . AMS >) (B phase input)
125
LATCH
O
Not used (open)
126
REC
O
Power on/off control signal output for the beep sound drive “L”: power off, “H”: power on
(Used for the except US and Canadian models)
(Used for the except US and Canadian models)
127
COAX/OPT
O
Optical in or coaxial in selection signal output terminal “L”: optical in, “H”: coaxial in
Not used (open)
Not used (open)
128
FL-CS
O
Chip select signal output to the fluorescent indicator tube/LED driver (IC761)
129
I2CPOWER
I
Power supply detection signal input from the IIC bus
130
VSS
—
Ground terminal
131
STB
O
Relay drive signal output for the power on/off “L”: standby, “H”: power on
132
VCC
—
Power supply terminal (+3.3V)
133
IOP
I
Optical pick-up voltage detection signal input from the automatic power control circuit
134
DESTINATION
I
Destination setting input terminal “L”: AEP, UK, Hong Kong, Argentine, and Australian
models, “H”: US, Canadian, Singapore, and Brazilian models
models, “H”: US, Canadian, Singapore, and Brazilian models
135
MODEL
I
Model setting input terminal Fixed at “M” in this set
136
BEEP SW
I
BEEP switch (S831) input terminal “L”: beep off, “H”: beep on
(Used for the except US and Canadian models)
US and Canadian models: Not used (fixed at “L”)
(Used for the except US and Canadian models)
US and Canadian models: Not used (fixed at “L”)
137
KEY3
I
Key input terminal (A/D input) Not used (fixed at “H”)
138
KEY2
I
Key input terminal (A/D input) S721 to S724 and S726 (INPUT, PLAY MODE, REC MODE,
LEVEL/DISPLAY/CHAR, I/1) keys input
LEVEL/DISPLAY/CHAR, I/1) keys input
139
KEY1
I
Key input terminal (A/D input)
S711 to S715 (MENU/NO, YES, PUSH ENTER, CLEAR, Z) keys input
S711 to S715 (MENU/NO, YES, PUSH ENTER, CLEAR, Z) keys input
140
AVSS
—
Ground terminal (for analog system )
141
KEY0
I
Key input terminal (A/D input) S701 to S705 (z, x, M, m, u) keys input
142
VREF
I
Reference voltage (+3.3V) input terminal (for A/D converter)
143
AVCC
—
Power supply terminal (+3.3V) (for analog system )
144
NC
O
Not used (fixed at “L”)
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