JVC KW-XC777 Service Manual page 39

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UPD789166GB-590 (IC431) : CPU
1.Pin layout
11
2.Pin function
Pin No. Symbol
1 KEY0
2 KEY1
3 KEY2
4 KEY SEL
5 DOLBY SEL
6 RPT SEL
7 B.SKIP
8 NC
9 AVSS
10 NC
11 BUS-I/O
12 BUS-INT
13 TAPE IN
14 MAIN POWER
15 PWR_DET
TE
L 13942296513
16 BUS-SCK
17 VDD1
18 BUS-SO
19 BUS-SI
20 NC
21 NC
22 ICO
23 XT2
24 XT1
25 RESET
26
27
28 VSS0
29 VDD0
30 DOLBY
31 MS IN
32 FF/REW
33 MOTOR
34 SUBMO-
35 SUBMO+
36 HEAD SEL
37 VSS1
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38 REEL
39 STANBY
40 MODE
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41 PREQ
42 MUTE
43 AVDD
44 AVREF
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33
1
~
~
23
12 ~ 22
I/O Function
I KEY0 input terminal
I KEY1 input terminal
I KEY2 input terminal
I KEY in select setting terminal (H:active)
I DOLBY select setting terminal L: No DOLBY
I REPEAT select setting input terminal L:No REPEAT
I B.SKIP select setting input terminal
- Connect to GND
- A/D converter GND voltage. Connect to GND
O Non connect
O J-BUS I/O switching output. output:H input:L
I J-BUS signal interlupt input
I Tape IN detection switch input
I CTRL+B input
I MEMORY detection
I/O J-BUS clock input/output
- Power supply (without port section) connect to 5V
O J-BUS data output terminal
I J-BUS data input terminal
- Non connect
- Non connect
- Connect to VSS0 or VSS1
- Non connect
- Connect to VSS0 or VSS1
- Reset detection terminal
X2 - X'tal oscillator (4.1943MHz)
X1 - X'tal oscillator (4.1943MHz)
- Ground voltage of port section. Connect to GND
- Power supply for port section Connect to 5V
O DOLBY ON/OFF setting output H:ON
I MS input
O Input level selrct for MS L:FF,REW H:Normal PLAY
O Main motor output H:Motor rotation
O Clockwise operation output for sub motor
O Counterclockwise operation output for sub motor
O HEAD AMP input signal select output
I GND voltage (without port section)
I REEL palse input
I Standby position detection
x ao
y
I Mode palse input
i
O Power request output H:cassette mechanism operation
O Mute request output L:mute request
- A/D converter analog power supply. Connect to 5V
- A/D converter reference voltege. Connect to 5V
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H:Normal operation
Q Q
3 6 7 1 3
H:EJECT side L:operation side
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L: mechanism position fix
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2 9 9 4 2 8
L:Save mode
1 5 0 5 8 2 9 9 4
L:FWD H:REV
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KW-XC777
9 9
2 8 9 9
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