JVC KW-XC777 Service Manual page 34

KW-XC777
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UPD784216AGC160 (IC701) : CPU
3 7 63 1515 0
1.Pin layout
30
2.Pin function (1/2)
Pin No. Symbol
1 NC
2 NC
3 NC
4 NC
5 NC
6 NC
7 NC
8 MUTE
9 VDD
10 X2
11 X1
12 GND
13 XT2
14 XT1
15 RESET
16 J-BUS INT
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17 REMOCOM
18 ACC DET
19 MEMOREY DET
20 SW1
21 CST P.REQ
22 AD SEL
23 AVDD
24 AVREF0
25 KEY0
26 KEY 1
27 KEY 2
28 KEY 3
29 S METER
30 ANA
31 TEMP
32 IOP
33 AVss
34 DIMMER IN
35 CFL BRIGHT
36 AVREF1
37 J-BUS SI
38 J-BUS SO
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39 J-BUS SCK
40 J-BUS I/O
41 LCD DATA
42 LCD SCK
43 LCD CE
44 BEEP
45 NC
1-34
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100 ~ 81
1 80
~ ~
51
31 ~ 50
I/O Function
- Non connect
- Non connect
- Non connect
- Non connect
- Non connect
- Non connect
- Non connect
- Mute output terminal
- Connect to VDD
- Connect to 12.5MHz X'tal oscillator (output) (Main)
- Connect to 12.5MHz X'tal oscillator (input) (Main)
- Connect to GND
- Connect to 32.768KHz X'tal oscillator (output) (Sub)
- Connect to 32.768KHz X'tal oscillator (Input) (Sub)
I System reset input terminal
I Interlupt signal detection terminal from J-BUS comunication
I Interlupt signal detection terminal from remote controller
I ACC power supply detection terminal ("L" input hold)
I Backup power supply detection terminal
I CD mechanism SW1 input terminal
I Cassette mech power supply inclease request signal input
O Audio signal switching output (CD-CH/LINE INPUT mode:"H")
- Connect to VDD (A/D converter power supply)
- Connect to VDD (A/D converter reference power supply)
I KEY0 input terminal
I KEY1 input terminal
I KEY2 input terminal
I KEY3 input terminal
I S meter voltage input terminal
I Level meter level input terminal
I Power supply input terminal from thermister (for contrast temp.)
I Pickup laser level detection terminal
- Connect to GND (A/D converter, D/A converter GND)
I Dimmer signal input terminal (dimmer "L" input)
O DIMMER ON "H" output
- Connect to VDD (D/A converter reference power supply)
I Data input from J-BUS
O Data output of J-BUS
I/O Clock output for J-BUS
O Input/output select signal outtput of J-BUS (output "H", input "L")
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O Data output terminal for LCD driver
O Clock output terminal for LCD driver
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O Chip enable output terminal for LCD driver
O BEEP output terminal (output frequency 1.5KHz,3.1KHz)
O Non connect
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