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3. Pin function
Pin
Symbol
I/O
No.
1
MT0
O
CD door motor control signal 0 output
2
MT1
O
CD door motor control signal 1 output
3
MTS
O
Motor speed control output (L:Normal, H:Slow)
4
BLCTL
O
Back light power supply control output
5
AHB
O
AHB ON/OFF control signal output (L:ON, H:OFF)
6
SMUTE
O
System mute control signal output
7
TUST
O
Tuner control strove output
8
CDLED
O
CD LED control signal output (L:OFF, H:ON)
9
VSS0
-
Ground at port section
10
VDD0
-
Power supply at port section
11
MPX
I
Stereo indicator control signal input (L:Stereo)
12
RDSDI
I
RDS data input
13
DRMUTE
O
Driver mute output
14
SCD
I
Voltage detection for safety of CD
15
TUDATA(I)
I
Tuner control data input
16
TUDATA(O)
O
Tuner control data output
17
TUCK
O
Tuner control clock output
18
SUBQ
I
CD control Q code input
19
XRST
O
CD control reset signal output
20
SQCK
O
CD control Q code clock signal output
21
MLD
O
CD control command load signal output
22
MDATA
O
CD control command data signal output
23
MCLK
O
CD control command clock signal output
24
VDD1
-
Power supply without port section
25
AVSS
-
Ground of A/D converter
26
STAT
I
CD control status signal input
27
REST
I
CD rest switch detection signal input
28
KEY1
I
Main body top section tact switch detection signal input
29
KEY2
I
Main body top section tact switch detection signal input
30
KEY3
I
Main body front section tact switch detection signal input
31
SAFETY
I
Voltage detection for safety
32
LDCK
I
CD door motor lock detection signal input
33
VERSION
I
Version detection
34
AVREF
I
Reference voltage input for A/D converter
35
AVDD
-
Analog power supply for A/D converter
36
RESET
I
System reset signal input
37
XT2
-
Sub clock
38
XT1
I
Sub clock signal input 32.768kHz
39
IC
I
Connect to VSS0 or VSS1
40
X2
-
Main clock
41
X1
I
Main clock signal input 4.19MHz
42
VSS1
-
Ground without port section
43
REM
I
Remote controller signal input
44
RDSCK
I
RDS clock signal input
45
XKILL
O
Sub clock OSC control signal output
46
BEAT
O
Main clock shift control signal output
47
BUP
I
Back up detection signal input
48
+BCTL
O
Power supply control at back up operating
49
VDATA
O
BD3861FS (VOL & FUNC IC) control data signal output
50
VCLK
O
BD3861FS (VOL & FUNC IC) control clock signal output
51
I
Cd door position detection switch input
DOOR1
52
DOOR2
I
CD door position detection switch input
53
DOOR3
I
CD door position detection switch input
54
LOMUTE
O
LINE OUT muting control signal output
55
RS
O
LCD driver control resistor select signal output
56
E
O
LCD driver control enable signal output
57
D84
O
LCD driver control data bus signal output
58
D85
O
LCD driver control data bus signal output
59
D86
O
LCD driver control data bus signal output
60
D87
O
LCD driver control data bus signal output
61
DIMMER
O
Back light DIMMER control signal output
62
POUT
O
Power supply control signal output for amp section
63
FTU
O
Power supply control signal output for TUNER function
64
FCD
O
Power supply control signal output for CD function
Function
FS-SD990 / FS-SD770
FS-SD550
UPD780024AGKB19
1-21
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