Microcomputer's Terminal Description - Kenwood KDC-MP5043U Service Manual

KDC-MP242U/MP342U/MP443U
KDC-MP5043U/MP543U

MICROCOMPUTER'S TERMINAL DESCRIPTION

● SYSTEM μ-COM: IC1 on X34- (ELECTRIC UNIT)
Pin No. Pin Name
1 LX DATA M
2 LX CLK
3~5 NC
6 REMO
7 NC
8 BYTE
9 CNVSS
10 XCIN
11 XCOUT
12 RESET
13 XOUT
14 VSS
15 XIN
16 VCC1
17 NMI
18 PANEL DET
19,20 NC
21 ROMCOR DET
22,23 NC
24 PON FL
25 NC
26 PON PANEL
27,28 NC
29 AUD SCL
30 AUD SDA
31 VFD SYS DATA
32 VFD PAN DATA
33 VFD CL
34 VFD BLK
35 S SYS DATA
36 S SOC DATA
37 S SOC CLK
38 CD LOS SW
39 CD LOE LIM SW
40 CD LOEJ
6
I/O Application
I/O Data to slave unit
I/O LX-BUS clock
- Not used
I Remote control signal input
- Not used
I Memory extension bus width setting
-
- 32.768kHz
- 32.768kHz
-
- 10.0MHz
-
- 10.0MHz
-
I
I Panel communication detection
- Not used
I E2PROM writing request
- Not used
O Key illumination power supply control
- Not used
I/O Panel 5V control
- Not used
I/O E-VOL clock input/output
I/O E-VOL data input/output
O VFD data output
I VFD data input
O VFD clock output
O VFD driver reset output
O Bolero serial output
I Bolero serial input
I Bolero serial clock input
I CD loading detection
I CD detection (Chucking SW)
I/O CD motor control
Truth Value
Processing Operation Description
Table
125kHz~65kHz
Output L fi xed
Detects pulse width
Output L fi xed
Connects to VSS
Connects to VSS. H: Possible to rewrite fl ash ROM
L: Reset
Connects to VSS
H: Panel detached, L: Panel attached
Output L fi xed
H: E2PROM writing
Output L fi xed
ON: H, OFF: L
Output L fi xed
ON: L
11 minutes after momentary power-down, panel
detached or ACC OFF: Hi-Z
Output L fi xed
The communication begins after 500ms after
VFD_BLK (34) goes Hi.
125kHz
H: Reset cancelled, L: Reset
11 minutes after momentary power-down, panel
detached or ACC OFF: L
H: Loading completed, L: No disc
q Refer to the truth value table