Microcomputer's Terminal Description - Kenwood KAC-PS621 Service Manual

KAC-PS621/X621

MICROCOMPUTER'S TERMINAL DESCRIPTION

MICROPROCESSOR : 784224YGC117 (X09 : IC6)
◊ Block Digram
◊ 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 H/U
- 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 H/U
O Data output to H/U
I CLK input from H/U
I LX BUS communication, H/U connect detection
O Not used
I/O Data input/output AMP communication
O 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
784224YGC117
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