Microcomputer's Terminal Description - Kenwood KDC-MP628 Service Manual

KDC-MP628/MP7028/MP728
MP8029/W7031/W7031Y

MICROCOMPUTER'S TERMINAL DESCRIPTION

● SYSTEM MICROCOMPUTER : IC102 (X34- : ELECTRIC UNIT)
Pin No. Pin Name
1 VREF
2 AVCC
3 LX DATA S
4 LX DATA M
5 LX CLK
6 WIRED REMO
7 LX MUTE
8 AUD SDA
9 AUD SEL
10 AUD SCL
11 DAC RST
12 NC
13 BYTE
14 CNVSS
15 XCIN
16 XCOUT
17 RESET
18 XOUT
19 VSS
20 XIN
21 VCC1
22 NMI
23 PANEL DET
24 RDS CLK
25 LX REQ S
26 PON AM
27 LX REQ M
28 TUN IFC OUT
29 RDS AFS L
30 RDS AFS M
31 RDS QUAL
32 RDS DATA
33 PWIC BEEP
34 TUN SCL
35 TUN SDA
36 SYS DATA
37 VCC1
38 PAN DATA
39 VSS
40 SYS REQ
41 PAN REQ
42 SDA
6
I/O Function
- Analog reference voltage
-
I Data from slave unit
O Data to slave unit
I/O LX-BUS clock
I External display remoter controller
I Mute request from slave unit
O E-VOL data
O E-VOL control
O E-VOL clock
O DAC reset
- Not used
- GND
-
I Clock
I Clock
I Reset
- Clock
- GND
- Clock
-
I
I Panel detection
I RDS decoder clock
I Communication request from slave unit
I/O AM power supply control
O Communication request to slave unit
I Front-end IFC out
I/O Time constant switching when noise detected
I/O Time constant switching when noise detected
I RDS decoder QUAL
I RDS decoder DATA
O Beep
I/O Front-end I2C clock
I/O Front-end I2C data
O Inside-panel communication data
-
I Inside-panel communication data
-
Communication request from system µ-com
O
I Communication request from panel
I/O E2PROM I2C data
Processing Operation
H : MUTE ON, L : MUTE OFF
SPI communication
SPI communication
SPI communication
L : DAC RESET
32,768kHz
32,768kHz
12MHz
12MHz
H : No panel, L : Panel exists
AM in operation : H, AM not in operation : HI-Z
H : Station exists, L : No station
Refer to Truth Value Table (RDS AFS)
Refer to Truth Value Table (RDS AFS)
MAX 400kHz
MAX 500kbps
MAX 500kbps
MAX 100kHz