KRC-17G/YA/YG, 194A/G/YA/YG, 266LA/LG/RG
KRC-27YA/YG, 2904YA/YG, 294A/G/YA/YG
4
● SYSTEM MICROCOMPUTER UPD780058GC (IC1 : X14)
Pin No.
Pin Name
I/O Function
Operating Condition
1 PANEL I Panel detection. "L" : Panel exists.
2 L CE O
LCD driver chip enable.
-
3 L RES O LCD driver reset. -
4 AVSS - GND. -
5 R DATA I RDS data. -
6 R QUAL I RDS receiving. -
7
AVREF 1
- Reference voltage. -
8
IC2 SEL 1
I Selector. "L" : Normally.
9
IC2 SEL 0
I Selector. "L" : Normally.
10 - - - -
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.
-
14,15 - - - -
16 DATA C I
Changer communication data.
-
17 DATA H O
Changer communication data.
-
18 CH CLK I
Changer communication clock.
-
19-26 - - - -
27 MOTOR O
Cassette tape motor SW.
-
28 FF/REW I
Cassette tape FF/REW detection.
"L" : FF or REW works.
29-31 - - - -
32 SD I Signal detection. "H" : Signal exists.
"L" : Signal does not exist.
33 VSS 1 - GND. -
34 - - - -
35 PLL CLK O
Front-end communication clock.
-
36
PLL DATA
I/O F
ront-end communication data.
-
37 AM +B O
AM power supply SW.
-
38 FM +B O
FM power supply SW.
-
39
IC2 DATA
I/O
E-volume communication data.
-
40 IC2 CLK O
E-volume communication clock.
-
41 AFC O
FM noise detection / Time constant SW.
-
42 MUTE O Mute control. -
43
AMP MUTE O
Power amplifier mute.
-
44 - - - -
45 CH CNT O Changer control. -
Pin No.
Pin Name
I/O Function
Operating Condition
46 REQ H O Changer request. -
47 - - - -
48 SVR O SVR control. -
49
AMP STBY
O
Power amplifier stand-by.
-
50 BEEP O Buzzer signal output.
51,52 - - - -
53 P.CONT O Power control SW. -
54
ACC DET
I ACC detection. -
55
B.U. DET
I Back-up detection. -
56 P.ON O Power SW. -
57 ILLUMI O Illumination SW. -
58
FWD/REV
I
Cassette mechanism FWD/REV detection.
-
59 - - - -
60 RESET I
System reset signal input.
-
61 SEL 1 I Destination SW. -
62 R CLK I RDS clock. -
63 REQ C I Changer request. -
64 PACK IN I
Cassette tape pack-in detection.
-
65
KEY-REQ
I
Key signal input detection.
-
66 SEL 0 I Destination SW. -
67 VSS 0 - GND. -
68 VDD 1 - 5V power supply. -
69 X2 - Main system clock. -
70 X1 I Main system clock. -
71 IC - GND. -
72 - - - -
73 XT1 - 5V power supply. -
74 VDD 0 - 5V power supply. -
75
AVREF 0
I
A/D converter reference voltage.
-
76
S METER
I S-meter detection.
"H" : S-meter exists.
"L" : S-meter does not exist.
77 PHONE I -
Navigation mute : 2.5V or more.
Telephone mute : 1V or less.
78 NOISE I FM noise detection. -
79
AV CONT
O
A/D converter reference voltage.
-
80 - - - -
MICROCOMPUTER'S TERMINAL DESCRIPTION
