KRC-31Y/36/366L/37/Y
/391/394/Y/466R/4904Y
4
MICROCOMPUTER’S TERMINAL DESCRIPTION
●
Microcomputer : UPD780058GCxxx (X14 : IC1)
Pin No.
Pin Name
I/O
Function / Operating Condition
1
DSI
O
DSI control.
2
PANEL
I
Panel detection. “L” : Panel exists
3
-
-
-
4
AVSS
-
GND.
5
L-RST
O
LCD driver reset.
6
L-CE
O
LCD driver chip enable.
7
AVREF1
I
Reference voltage.
8
-
-
-
9
PLL-DATA
I/O
Front-end communication data.
10
PLL-CLK
O
Front-end communication clock.
11
L-DATA L
I
LCD driver communication data.
12
L-DATA S
O
LCD driver communication data.
13
L-CLK
O
LCD driver communication clock.
14
R-DATA
I
RDS data.
15
R-QUAL
I
RDS QUAL.
16
CH-DATA C
I
Changer communication data.
17
CH-DATA H
O
Changer communication data.
18
CH-CLK
I/O
Changer communication clock.
19
M-STBY
I
Cassette tape standby detection.
“H” : Standby
20
T-END
I
Tape end detection. “H” : Run, “L” : Stop
21
ACC-DET
I
ACC detection.
22
BU-DET
I
Backup detection.
23
IC2 TYPE 0
I
For service. “L” : Normally
24
IC2 TYPE 1
I
For service. “L” : Normally
25
TYPE 0
I
Destination discrimination.
26
TYPE 1
I
Destination discrimination.
27
TYPE REF
O
Reference voltage for destination
and service.
28
MOTOR
O
Cassette mechanism motor.
“H” : ON, “L” : OFF
29
PLL-CE
O
Front-end communication ship enable.
30
SD
I
Station detection. “H” : Station exists,
“L” : Station does not exist
31
ASF
O
Noise detection time constant switch.
32
LO/DX
O
Local seeking switch. “H” : LO, “L” : DX
33
VSS1
-
GND.
34
P-MUTE
O
Power amplifier muting.
35
SVR
O
SVR control.
36
-
-
-
37
IC2-SCL
O
E-volume communication clock.
38
IC2-SDA
I/O
E-volume communication data.
39
MUTE
O
Muting control.
40
P-STBY
O
Power amplifier standby.
Pin No.
Pin Name
I/O
Function / Operating Condition
41
P. CON-DET
I
P. CON short-circuited detection.
42
CH-CONT
O
Changer control.
43
-
-
-
44
CH-REC H
O
Changer request.
45~47
-
-
-
48
EN2-1
O
Power supply IC control.
49
EN2-0
O
Power supply IC control.
50
BEEP
O
Buzzer.
51
EN3
O
Power supply IC control.
52
EN1
O
Power supply IC control.
53
SW 5V
O
P. ON 5V control. “H” : OFF, “L” : ON
54
MUSIC
I
Tape signal detection. “H” : Signal
does not exist, “L” : Signal exists
55
MS-CONT
O
tape advanced sensitivity control.
“H” : Play, “L” : FF/REW
56
EQ-MUTE
O
Cassette tape muting. “H” : ON, “L” : OFF
57
FWD/REV
I
Cassette tape runing direction detection.
“H” : FWD, “L” : REV
58
SUB+
O
Sub motor control.
59
SUB-
O
Sub motor control.
60
RESET
I
System reset.
61
REMOTE
I
Remote control.
62
R-CLK
I
RDS clock.
63
CH-REQ C
I
Changer request.
64
PACK-IN
I
Cassette tape pack-in detection.
65
KEY-REQ
I
Key signal detection.
66
-
-
-
67
VSS0
-
GND.
68
VDD1
-
VDD.
69
X2
-
Main system clock.
70
X1
I
Main system clock.
71
IC
-
-
72
-
-
-
73
XT1
-
VDD.
74
VDD0
-
VDD.
75
AVREF 0
I
Reference voltage.
76
S-METER
I
SD detection.
“H” : SD exists, “L” : SD does not exist
77
T-MODE
I
Cassette tape mode detection.
78
PHONE
I
Navi mute : Over 2.5V,
Tel mute : Less tha 2.5V
79
NOISE
I
Noise detection during FM mode.
80
AV CONT
O
reference voltage.
