Microcomputer's Terminal Description - Kenwood KAC-X542 Service Manual

KAC-X542

MICROCOMPUTER'S TERMINAL DESCRIPTION

MICROPROCESSOR (X09 : IC3)
Block Diagram
Terminal Function
Pin No. Pin Name
1~3 TEMP4~TEMP6
4 AVSS
5 L CE
6 LX REQ S
7 AVREF1
8 L DATA L
9 L DATA A
10 L CLK
11 LX DATA M
12 LX DATA S
13 LX CLK
14 LX BU
15 NC
16 SDA AMP
17 NC
4
AMP communication I/F
AMP SCL
AMP SDA
Audio control
AUDIO SCL
AUDIO SDA
AUDIO MUTE
E2PROM I2C
communication
E2P SCL
E2P SDA
Destination, AMP ID
DIP-SW1
DIP-SW2
DIP-SW3
DIP-SW4
MODEL1
MODEL2
Protection control
DC-DET
D-CUR
AB-CUR
ATT1
ATT2
ATT3
Illumination control
LCD-ILL
WHITE-LED
Mute control
MUTE1
MUTE2
I/O Function
I Temperature detection 4~6
- GND
O CE output to LCD driver
O Data transmit request to head unit
- DA reference voltage
I Data input from LCD driver
O Data output to LCD driver
O CLK output to LCD driver
I Data input from head unit
O Data output to head unit
I CLK input from head unit
I LX BUS communication, head unit connect detection
- Not used
I/O Data input/output AMP communication
- Not used
LX BUS I/F
LX REQ M
LX REQ S
LX DATA M
LX DATA S
LX CLK
LX RST
HU BU
Display data monitor
AD-I
AD-V
TEMP1
TEMP2
TEMP3
TEMP4
TEMP5
TEMP6
AMP µ-com
Power supply control
COMM-SW
D-PWER
POWER-ON
5VSW
V DOWN
PCON
LX CON
LCD driver I/F
L DATA L
L DATA A
L CLK
L CE
Fan control
FAN1
FAN2
Processing Operation Description
H : LCD driver CE
H : OFF, L : ON
H : Not connect (Except master amplifier), L : Connect