Description Of Major Ics - JVC KD-SX950 Service Manual

Description of major ICs

UPD784215GC-157 (IC701) : UNIT CPU
1.Terminal Layout
75 ~ 51
76
100
1 ~
2.Pin Function (1/2)
Symbol
I/O
Pin No.
1
I
SW2
2
I
SW3
3
SW4 I
4
I
REST
5
O
LM0
6
LM1 O
7
-
NC
8
O
LCDPWR
9
VDD -
10
-
X2
11
-
X1
12
VSS -
13
-
XT2
14
-
XT1
15
RESET I
16
I
SW1
17
I
BUSINT
18
PS2 I
19
I
CRUISE
20
-
NC
21
NC -
22
I
REMOCON
23
-
AVDD
24
AVREF0 -
25
I
VOL1
26
I
VOL2
27
KEY0 I
28
I
KEY1
29
I
KEY2
30
LEVEL I
31
I
32
I
33
AVSS -
34
O
NC
35
O
NC
36
AVREF -
50
26
25
Detection switch of CD mechanism
Detection switch of CD mechanism
Detection switch of CD mechanism
Reset signal input from CD mechanism
Loading motor control signal output
Loading motor control signal output
Non connect
LCD driver power supply control output
Power supply terminal
Connecting the crystal oscillator for system main clock
Connecting the crystal oscillator for system main clock
Power supply terminal
Connecting the crystal oscillator for system sub clock
Connecting the crystal oscillator for system sub clock
System reset signal input
Detection switch of CD mechanism
Cut-in input for J-BUS signal
Power save 2, Working together back up by H input, to stop mode
Pulse signal input port for Cruise control
Clock signal input for RDS
RDS data input
Remote control signal input
Power supply terminal
Power supply terminal
Input for rotation volume detection pulse judgment to relation V1
Input for rotation volume detection pulse judgment to relation V2
Key control signal input 0
Key control signal input 1
Key control signal input 2
Signal input port of level meter
Connect to GND
Subwoofer volume control analogue output
Non connect
Power supply terminal
Function
H:ON