Kenwood KDC-M7024 Service Manual page 6

KDC-M7024/MP822
MICROCOMPUTER'S TERMINAL DESCRIPTION
Pin No. Pin Name
23 BU_DET
24 ACC_DET
25 SW5V
EXT_AMP_CONT
26
NC
27 DIMMER
28 ANT_CON
29 P_ON
30 ILL_ON
31 RESET
32 XT1
33 XT2
34 REGC
35 X2
36 X1
37 VSS
38 VDD
39 CLKOUT
40 LX_REQ_M
41 LX_MUTE
42 LX_CON
43 LX_RST
44 CD_MECHA+B I/O
45 TYPE0
46 TYPE1
47 IC2_TYPE0
48 IC2_TYPE1
49 NC
50 E2P5V
51 DSI
52 L_CE
53 L_INH
54 VOL A
55 BVDD
56 BVSS
57 VOL B
58 M_RST
59 M_STOP
60 CD_SW3
61 LO/EJ
62 MOSW
6
I/O Module Purpose / Description
I Extra Momentary power dropped detection.
I Extra ACC detection.
I/O Power supply 5V power supply.
O Extra External amplifier control.
O NC (Without EXT_AMP_CONT model)
I Extra Small lamp detection.
O Extra Antenna control.
SW 14V, SW 5V control, AD reference
I/O Power supply
voltage control output.
I/O Power supply FL, illumination output.
-
- Sub clock.
- Sub clock.
-
- Main clock.
- Main clock.
-
-
-
O LX Communication request to external slave.
I LX Mute request from external slave.
O LX External slave select.
Reset output to external slave µ-com.
O LX
Power supply DC 5.0V output.
I Extra Destination select.
I Extra Destination select.
I Extra IC2 destination.
I Extra IC2 destination.
O NC
I/O Power supply E2PROM, DA converter power supply control.
I/O To panel DSI control.
O To panel Chip enable output to LCD driver.
O To panel Inhibit signal output to LCD driver.
I To panel VOL input.
-
-
I To panel VOL input.
O CD Reset output to CD mechanism.
O CD Stop request to CD mechanism.
I CD DC down switch detection.
I/O CD CD mechanism loading/eject switch.
O CD CD mechanism motor driver switch.
Truth table Processing Operation
Backup : L,
No backup, momentary power dropped : H
With ACC : L, Without ACC : H
ON : L, OFF : Hi-Z
Refer to external amplifier control.
Output : L
ON : L, OFF : H
Tuner ON : H, Other source With RDS last FM
w
: H, Other source with RDBS TI ON last FM : H
Power ON : H, Power OFF : Hi-Z
ON : H, OFF : Hi-Z
32.768kHz
32.768kHz
Connect to 1µF capacitor.
20MHz
20MHz
Request : L
Mute ON : H
ON : H, OFF : L
Normally : L, After system reset : H (400ms
or more) and then L
CD source : H, Except CD source : L,
ON : Fast 50ms than M_STOP,
OFF : Slow 50ms than M_STOP
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w
w
w
Output : L
ON : L, OFF : Hi-Z
ON : L, OFF : Hi-Z
Normally : H, Reset, momentary power dropped : L
Normally : H, Reset : L (Per mechanism control)
Stop : L, CD : H
Chucking : H
Stop, brake : Hi-Z, Loading : L, Eject : H
Loading, eject, brake : H