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