Microcomputer's Terminal Description; System Μ-Com : Ic1 On X34- (Electric Unit) - Kenwood KDC-MP4028 Service Manual

MICROCOMPUTER'S TERMINAL DESCRIPTION

SYSTEM µ-COM : IC1 on X34- (ELECTRIC UNIT)
Pin No. Pin Name I/O
1 REMO I
2 LX MUTE I
3 AUD SDA I/O
4 AUD SEL O
5 AUD SCL O
6 BYTE -
7 CNVSS -
8 XCIN I
9 XCOUT -
10 RESET I
11 XOUT -
12 VSS -
13 XIN I
14 VCC1 -
15 NMI I
16 CN DET I
17 NC -
18 LX REQ S I
19 PON AM I/O
20 LX REQ M O
21 TUN IFC OUT I
22 RDS AFS L I/O
23 RDS AFS M I/O
24,25 NC -
26 PWIC BEEP O
27 TUN SCL I/O
28 TUN SDA I/O
29 VFD SYS DATA O
30 VFD PAN DATA I
31 VFD CL O
32 VFD INH O
33 SDA I/O
34 SCL I/O
35 PON PANEL I/O
36 DSI I/O
37,38 NC -
39 EPM I
40 PANEL DET I
Application
Remote control signal
Mute request from slave unit
E-VOL data
E-VOL control
E-VOL clock output
GND
Oscillator terminal
Oscillator terminal
Reset detection
Oscillator terminal
Oscillator terminal
Panel communication detection
Communication request from slave unit
AM power supply control
Communication request to slave unit
Front-end IFC output
Function for models of European Market
Function for models of European Market
Beep
Front-end I2C clock
Front-end I2C data
VFD data
VFD data
VFD clock
VFD data blanking
CD mecha I2C data
CD mecha I2C clock
Panel 5V control
DSI / Eject LED control
To VSS via a resister
Panel detection
KDC-MP4028/MP428/MP6029
Processing Operation
Detects puls width
H : MUTE ON, L : MUTE OFF
32.768kHz
12.0MHz
H : Panel off, L : Panel on
AM is received : H, AM is not received : Hi-z
H : Station exists, L : Station does not exsist
MAX 400kHz
125kHz
H : VFD turns on, L : VFD turns off
ON : L
Momentary power down, panel off, 11 munits after ACC OFF : Hi-Z
OFF : Hi-z, Panel off : Puls drives, Illumination on and power on : H
L : Panel off, H : Panel on
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