JVC KD-S687 Service Manual page 18

KD-S687
UPD178078GF-559 (IC701) : System CPU
1.Pin layout
81
~
100
2.Pin function (1/2)
Pin
NO.
1
2 BUSINT
3 BUSSI
4 BUSSO
5 JBUS-SCK
6,7,8
9 VOL-DA
10 VOL-CLK
11
12 LCDDA
13 LCDCLK
14 BUSI/O
15
16 LCDCE
17 SW2
18 SW3
19 SW4
20 RSTSW
21 ENC1
22 ENC2
23 KEY0
24 KEY1
25 KEY2
26 LEVEL
27 AVDD
28 SM
29
30,31
32 AVSS
33 REGCPU
34 VDD
35 REGOSC
36 X2
37 X1
38 GND0
39 SD/ST
40 GND2
41
42 IFC
43 VDDPLL
44 OSC
45
1-18
80 ~ 51
50
~
31
1 ~ 30
Symbol I/O
-
I
I
O
O
-
O
O
-
O
O
O
-
O
I
I
I
I
I
I
I
I
I
I
-
I
-
-
-
-
-
-
-
I
-
I
-
-
I
-
I
-
FUNCTION
No use
JVC bus communication line
JVC bus communication line
JVC bus communication line
JVC bus communication line
No use
Serial data for volume
Serial clock for volume
No use
LCD driver serial data output
Serial data for LCD
JVC bus output select
No use
LCD driver communication line
CD mech switch
CD mech switch
CD mech switch
Traverse mech rest switch
Encoder input
Encoder input
Key input
Key input
Key input
Audio level input
Power supply
Signal level meter input
No use
No use
Connect to GND
Connect to GND with capacitor
Power supply
Connect to GND with capacitor
System clock
System clock
Connect to GND
Station detector & Stereo indicator
Connect to GND
No use
IF count input
---
FM,AM osc input
No use