JVC KS-FX490 Service Manual page 30

4.9 UPD178078GF-618 (IC701) : System CPU
• Pin layout
80
81
100
1
• Pin functions
Pin No. Symbol
1 PS1(on)
2 PS2(stop)
3 POWER
4 STAND BY
5 TAPE IN
6 NC
7 J-BUS I/O
8 J-BUS IN
9 J-BUS OUT
10 J-BUS SCK
11 NC
12 I2C DA
13 I2CSCK
14 MODE
15 SUBMO+
16 SUBMO-
17 REEL
18 MS IN
19 DOLBY
20 HEAD SEL(F/R)
21 FF/REW
22 MOTOR
23 LEVEL
24 SM
25 SQ
26 NC
27 AVDD
28 NC
29 KEY0
30 KEY1
31 KEY2
32 AVSS
33 REGCPU
34 VDD
35 REGOSC
36 X2
37 X1
38 GND0
39 SEEK/STOP
40 GND2
41 NC
1-30 (No.49845)
51
50
31
30
I/O
I ACC ON/OFF detection signal input
I Memory ON/OFF detection signal input
O POWER ON/OFF control output
I Stand-by position detection signal input
I Cassette tape inside signal
- Not connect
O J-BUS I/O selection output
I J-BUS data input
O J-BUS data output
I/O J-BUS clock output/input
- Not connect
I/O E.VOL I2C data input/output
O E.VOL I2C clock
I Mecha position detection signal
O Sub motor control. Loading direction
O Sub motor control. Eject direction
I Reel pulse signal input
I MS signal input
O Dolby ON/OFF control
O Audio signal selector for head amp
O Audio level control for MS
O Main motor control
I Level meter input
I S.METER input
I SQ level input
I Connect to GND
- Power supply
- Connect to GND
I A/D key input 0
I A/D key input 1
I A/D key input 2
I Ground
- Connect to GND path through 0.1uF
- Power supply
- Connect to VDD
- X'tal
I X'tal
- Ground
O Auto seek/receiving control output
- Ground
- Pull down to GND
Function