3
Pin No.
Pin Name
I/O
Description
80
CD U/D SW
I
CD BU up/down switch signal input
81
STEREO
I
Stereo tuning signal input
82
TUNED
I
Tuning a frequency signal input
83
TAPE PHOTO
I
A deck photo sensor singanl input
SENSOR-A
84
TAPE PHOTO
I
B deck photo sensor singanl input
SENSOR-B
85
REMCON IN
I
Data input from the remote control receiver
86
VR ENCODER B
I
Volume signal input from the rotary encoder
87
VR ENCODER A
I
Volume signal input from the rotary encoder
88
CD OPEN
I
CD tray open switch signal input
89
VSS
—
Ground pin
90
VDD
—
Power supply pin (+5 V)
91
PT8300-A LATCH
O
Latch signal output to the I/O expander
92
PT8300-B LATCH
O
Latch signal output to the I/O expander Not used. (open)
93
LC72131 CE
O
Chip enable signal output to the PLL tuner IC
94
M61519 CLOCK
O
Clock output to the sound processor
95
LC72131,PT8300-AB,
O
Data output to the PLL tuner IC, the I/O expander and the sound processor
M61519 DATA
96
LC72131 DATA IN
I
Data input from the the PLL tuner IC
97
LC72131,PT8300
O
Clock output to the PLL tuner IC and the I/O expander
CLK
98
COIN
O
CD command data signal output
99
SQOUT
I
CD subcode Q signal input
100
SQCK
O
CD command clock signal output
HCD-RG55/RG55S
