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I/O
Pin
Terminal
No.
Name
43
VOL
O
Latch signal output for IC501
LTCH
44 E2P DIO
O
Not used, connected to GND
45 E2P CLK
O
Not used, connected to GND
46 E2P CE
O
Not used, connected to GND
47
HP
I
Headphone connecting detect
signal input
48 VR ATT
O
Volume attenuator signal output
49
CR
I
CR timer signal input
TIMER
50
CS4
I
Not used, connected to GND
51
CS3
I
Not used, connected to VREF
52
CS2
I
Not used, connected to VREF
CS1
53
I
Not used, connected to GND
54
CS0
I
Not used, connected to GND
55
LED
O
LED drive signal output
STBY
56
LED
O
LED drive signal output
TIMER
57
LED
O
LED drive signal output
STBY2
58 HP MUT
O
Mute signal output for
headphone when
the power ON/OFF
59 TUN CE
O
Chip enable signal output for
LC72131M
60
TUN
I
Data signal/stereo signal input
DIN/ST
61
TUN
O
Data signal output for LC72131M
DOUT
62
TUN
O
Clock signal output for
CLK
LC72131M
63 TUN SD
I
Station detect signal input
64 POWER
O
Power signal output
65
FAN1
O
Fan motor drive signal output 1
66
FAN2
O
Fan motor drive signal output 2
67
FRQ
O
Digital amplifier oscillated
SHIFT
frequency change signal output
68 PQ DET
-
Not used, connected to GND
69 RDS DIN
I
Data signal input from IC541
70
RDS
O
Clock signal output for IC541
CLK
71
RDS
I
Ready signal input from IC541
RDYIN
Function
32
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