98
HCD-M90
Pin No.
Pin Name
I/O
Description
84
STK PWR
O
Power on/off control signal output to the power amp “L”: power on
85
H/P MUTE
O
Muting on/off control signal output terminal Not used
86
AMP CE
O
Chip enable signal output to the electrical volume
87
VOL-SDA
O
Serial data output to the electrical volume
88
AMP CLK
O
Serial data transfer clock signal output to the electrical volume
89
STK MUTE
O
Muting on/off control signal output to the power amp “H”: muting on
90
END SW
I
Tape end detect switch input terminal “H” input when the tape end detected
91
TC SW
I
Half detect (side A and B) switch and cassette in detect switch input terminal (A/D input)
92
MODEL IN
I
Destination setting terminal
93
SPEC IN
I
Destination setting terminal
94, 95
KEY1, KEY2
I
Key input terminal (A/D input)
96
AG
—
Not used
97
KEY3
I
Key input terminal (A/D input)
98
VREF
O
Reference voltage (+4V) input terminal (for A/D conversion)
99
AVCC
—
Power supply terminal (+4V)
100
DC DETECT
I
Protect on/off control signal input from the speaker protect circuit “L”: protect on
