JVC ks-fx834r Service Manual page 16

KS-FX834R
QQ
3 7 63 1515 0
UPD178018AGC-551 (IC701) : Main system control CPU
1. Pin layout
80
1
20
21
2. Pin function
Pin No.
Port Name
1 KEY 0
2 KEY 1
3 KEY 2
4 LEVEL
5 SM
6 SQ
7 LCDCE
8 LCDDA
9 LCDSCK
10 BUSI/O
11 OPEN
12 BUSSI
13 BUSSO
14 BUSSCK
TE
L 13942296513
15 NC
16 NC
17 NC
18 NC
19 INLOCK
20 NC
21 GNDPORT
22 VDDPORT
23 NC
24 AFCK
25 MONO
26 FM/AM
27 SEEK/STP
28 NC
29 IFC
30 VDDPLL
31 FMOSC
32 NC
33 GNDPLL
34 AMEO
35 FMEO
www
36 IC
37 SD/ST
38 STAGE0
39 NC
40 MOTOR
1-16
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~ 61
60
41
~ 40
I/O
I Key input 0
I Key input 1
I Key input 2
I Level meter input
I S.meter level input
I S.Quality level input
O CE output to LCD driver
O Data output to LCD driver
O Clock output to LCD driver
I I/O selector output for J-BUS, H : OUT, L: INPUT
I Door open detect input
I J-BUS Data input
O J-BUS Data output
I/O J-BUS Clock in/output
- Non connect
- Non connect
- Non connect
- Non connect
- Non connect
- Non connect
- Port GND
- Port Vdd
O Non connect
O AF check output, L: AF check
O Monaural on /off selecting output, H:mono on
O FM/AM switching output L : FM H : AM
O Auto seek /stop selecting output, H: Seek, L:Stop
I Pulse signal input port for Cruise control
I FM/AM midle frequency counter input
- PLL Vdd
I FM/AM limited generator frequency input
- None connect
- PLL GND
O AM error out output
O FM error out output
- GND
x ao
y
I Station detector, Stereo signal input, H:Find Station, L:Stereo
I Pull up
. i
- Non connect
O Main motor output
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8
Descriptions
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2 9 9 4 2 8
1 5 0 5 8 2 9 9 4
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