Microcomputer's Terminal Description - Kenwood KDC-MP5033U Service Manual

KDC-MP5033U/MP532U
KDC-W534UA/UAY/UG/UGY/W5534U/UY

MICROCOMPUTER'S TERMINAL DESCRIPTION

SYSTEM µ-COM: IC101 on X34- (ELECTRIC UNIT)
Pin No. Pin Name
1 ACC DET
2 BU DET
3 ILLUMI DET
4 REMO
5 NC
6 BYTE
7 CNVSS
8 XCIN
9 XCOUT
10 RESET
11 XOUT
12 VSS
13 XIN
14 VCC1
15 NMI
16 CN DET
17 RDS CLK
18 LX REQ S
19 AUD MUTE
20 PWIC STBY
21 PWIC SVR
22 PWIC MUTE
23 LX REQ M
24 LX CON
25 LX RST
26 PWIC BEEP
27 TUN SCL
28 TUN SDA
29 VFD DATA
30 VFD INT
31 VFD CLK
32 VFD RST
33 LX DATA M
34 LX DATA S
35 LX CLK
36 VFD KEY REQ
37 RDS AFS L 2
38 RDS AFS L
6
I/O Application
I ACC power supply detection
I Momentary power down detection
I Dimmer illumination detection
I Remote control signal input
- Not used
-
-
I 32.768kHz
I 32.768kHz
-
- 12.0MHz
-
- 12.0MHz
-
- Not used
I Panel communication detection
I RDS decoder clock input
I Communication request from slave unit
O Mute control for IC10 and preout
O Power IC standby control
O SVR discharge circuit
O Power IC mute
O Communication request to slave unit
O Start-up request to slave unit
O Fouced reset to slave unit
O Beep output
I/O Front-end I2C clock input and output
I/O Front-end I2C data input and output
I/O VFD data input and output
I VFD INT input
O VFD clock output
O VFD driver reset
I/O Data to slave unit
I Data from slave unit
I/O LX-BUS clock
I Communication request from VFD driver
O RDS mute output
O RDS mute output
Truth
Processing / Operation / Description
Value Table
L: ACC found, H: No ACC
L: BU found, H: No BU or momentary power down
L: ON, H: OFF
Detects pulse width
Output L fixed
H: Panel opened, L: Panel closed
H: POWER ON, L: POWER OFF
SVR discharge circuit
STANDBY source or momentary power down: L
TEL mute: L
H: Slave unit starts up, L: Slave unit stops
H: Reset, L: Normal
MAX400kHz
Data input and output
INT input
125kHz
H: Reset cancelled, L: Reset
L: Momentary power down, panel detached or 11
minutes after ACC OFF
Connects to INT
H: Normal, L: FM/AM seek or AF search
q
(L: Tuner SRC or Auto Zero)
*Same process as RDS AFS L (Pin 38)
H: Normal, L: FM/AM seek or AF search
q
(L: Tuner SRC or Auto Zero)