Microcomputer's Terminal Description - Kenwood KDC-W241AY Service Manual

MICROCOMPUTER'S TERMINAL DESCRIPTION

● SYSTEM µ-COM: IC1 on X34- (ELECTRIC UNIT)
Pin No. Pin Name I/O
1 LX DATA M I/O Data to slave unit
2 LX CLK I/O LX-BUS clock
3~5 NC -
6 REMO I
7 NC -
8 BYTE -
9 CNVSS -
10 XCIN -
11 XCOUT -
12 RESET -
13 XOUT -
14 VSS -
15 XIN -
16 VCC1 -
17 NMI I
18 PANEL DET I
19,20 NC -
21 ROMCOR DET I
22,23 NC -
24 PON FL O
25 NC -
26 PON PANEL I/O Panel 5V control
27,28 NC -
29 AUD SCL I/O E-VOL clock output
30 AUD SDA I/O E-VOL data input/output
31 VFD SYS DATA O
32 VFD PAN DATA I
33 VFD CLK O
34 VFD BLK O
35 CD SI O
36 CD SO I
37 BUCK O
38 CD LOS SW I
39 PIO0 I
40 CD SRAMSTB O
41 EPM I
42 CD LOE LIM SW I
KDC-W241AY/W241GY/W3041A/W3041AY/W3041G
/W3041GY/W312A/W312AY/W312G/W312GY/W312SAY
Application
Not used
Remote control signal input
Not used
Memory extended bus width setting
32.768kHz
32.768kHz
10.0MHz
10.0MHz
Panel communication detection
Not used
E2PROM writing request
Not used
Key illumination power supply control
Not used
Not used
VFD data output
VFD data input
VFD clock output
VFD data blanking output
CD mechanism serial output
CD mechanism serial input
Serial clock output
CD loading detection
Communication request from mechanism DSP
1M-bit SRAM standby
Flash EPM input
CD detection (Chucking SW)
Truth Value
Processing Operation Description
Table
Pull-down (GND)
125k~65kHz
Output L fi xed
Detects pulse width
Output L fi xed
Connects to VSS
Connects to VSS
L: Reset
Connects to VCC
H: Panel detached, L: Panel attached
Output L fi xed
H: Writing
Output L fi xed
ON: H, OFF: L
Output L fi xed
ON: L, Momentary power down/Panel detached:
Hi-Z, 11 minutes after ACC OFF: Hi-Z
Output L fi xed
125kHz
H: Reset cancelled, L: Reset, Momentary power down
/Panel detached: L, 11 minutes after ACC OFF: L
1MHz
H: Data request
H: SRAM standby
Connects to VSS
H: Loading completed, L: No disc
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