KRC-31Y/36/366L/37/Y
/391/394/Y/466R/4904Y
4
MICROCOMPUTER’STERMINAL 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.
