Microcomputer's Terminal Description - Kenwood KDC-MP828 Service Manual

KDC-MP828/W7531/W7531Y/W8531
/W8531Y/X789/X8529/X889
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MICROCOMPUTER'S TERMINAL DESCRIPTION

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● 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
TE
L 13942296513
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
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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
x ao
y
-
Communication request from system µ-com
O
i
I Communication request from panel
I/O E2PROM I2C data
8
H : MUTE ON, L : MUTE OFF
SPI communication
SPI communication
SPI communication
L : DAC RESET
32,768kHz
32,768kHz
12MHz
Q Q
3 6 7 1 3
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
u163
.
MAX 100kHz
2 9 9 4 2 8
Processing Operation
1 5 0 5 8 2 9 9 4
m
co
9 9
2 8 9 9