JVC KW-XC828 Service Manual page 38

KW-XC828
UPD784215AGC173 (IC701) : Main micon
1.Pin layout
100 ~ 76
1
~
25
26 ~ 50
2.Pin functions(1/2)
Pin No. Symbol
1 NC
2 NC
3~7 NC
8 MUTE
9 VDD
10 X2
11 X1
12 GND
13 XT2
14 XT1
15 RESET
16 BUS INT
17 REMOCON
18 ACC DET
19 MEMORY DET
20 NC
21 CST P.REQ
22 CD P.REQ
23 AVDD
24 AVREF0
25 KEY0
26 KEY1
27 KEY2
28 KEY3
29 S.METER
30 LEVEL/ANA
31 TEMP
32 NC
33 AVSS
34 DIMMER IN
35 DIMMER OUT
36 AVREF1
37 BUS-SI
38 BUS-SO
39 BUS-SCK
40 BUS-I/O
41 LCD-DA
42 LCD-SCK
43 LCD-CE
1-38
75
~
51
I/O Function
O Non connect
O Non connect
O Non connect
O Mute output terminal("L" output at mute)
- Connects with VDD
- Connects with X'tal departure pendulum of 12.5MHz(output )(main)
- Connects with X'tal departure pendulum of 12.5MHz(input )(main)
- Connect with GND
- Connects with X'tal departure pendulum of 32.768KHz(output)
- Connects with X'tal departure pendulum of 32.768KHz(input)
I System reset input terminal
I Interrupt signal detection terminal from J-BUS communication
I Interrupt signal detection terminal from optical remote control
I ACC power supply detection terminal("L" become a holding mode
because of the input)
I Backup power supply detection terminal
("L" it when backup power supply is input)
("H" input when backup power supply uninputs)
O Non connect
I Cassette mechanism power supply start-up demand signal input
I CD mechanism power supply start-up demand signal input
- (Connect witj VDD)(Power supply for the A/D converter)
- (Connect with VDD)(Standard power supply for the A/D converter)
I KEY0 input terminal
I KEY1 input terminal
I KEY2 input terminal
I KEY3 input terminal
I Terminal of input of voltage of S meter(Electric field strength)
I Level input terminal of level meter
I Voltage input terminal (Use to correct the temperature of the contrast)
from the thermally sensitive resister.
I To GND with 47k
- (Connect with GND)(GND for the A/D converter and the D/A converter)
I Dimmer signal input terminal("L" input at dimmer)
O "H" output at DIMMER ON
- (Connect with VDD)(Standard power supply for the D/A converter)
I Input of data J-BUS communication
O Output of data of J-BUS communication
I/O Clock output for J-BUS communication
O Output of I/O switch signal of J-BUS communication
(output "H" and input "L")
O data output terminal to LCD driver
O Clock output terminal for communication to LCD driver
O Chip enable output terminal to LCD driver