51
MDS-S9
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 (pull down)
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 terminal for the beep sound drive Not used (open)
127
COAX/OPT
O
Optical in or coaxial in selection signal output terminal “L”: optical in, “H”: coaxial in
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 Fixed at “L” in this set
135
MODEL
I
Model setting input terminal Fixed at “M” in this set
136
BEEP SW
I
Beep switch input terminal 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
139
KEY1
I
Key input terminal (A/D 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 (pull down)
