Kenwood KDC-M6021/G Service Manual page 5

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MICROCOMPUTER'S TERMINAL DESCRIPTION
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IC1 (ELECTRIC UNIT : X25-9202-71)
Pin No. Pin Name
1 L-DATAS
2 L-CLK
3 PLL-DATA
4 PLL-CLK
5 AM+B
6 FM+B
7 CH-CON
8 CH-RST
9 EVDD
10 EVSS
11 AFS
12 BEEP
13 REMO
14 AUX SW
15 N/F SW
16 IC2-SDA
17 IC2-SCL
18 PRE-MUTE
19 N/F-MUTE
TE
L 13942296513
20 DIMMER-CON
21 TEST
22 SVR
23 P-MUTE
24 P-STBY
25 MUTE
26 SW5V
27 BU DET
28 ACC DET
29 N.C
30 DIMMER
31 N.C
32 P-CON
33 ANT-CON
34 RESET
35 XT1
36 XT2
37 REGC
38 X2
39 X1
40 VSS
41 VDD
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42 CLKOUT
43 CD MECH +B I/O MP3 CD mechanism power supply control output Lo: Power supply on, Hi-Z: Power supply off
44 P-ON
.
45 O-DATA
46 O-CLK
47 O-CE
48 N.C
I/O Description
O Data line to LCD driver
O Clock output to LCD driver
I/O Data input/output terminal with F/E
I/O Clock output to F/E
I/O AM+B control
I/O FM+B control
O Changer control output
O Reset output to changers
- Positive power supply connection terminal
- Ground connection terminal
O Noise detection time constant switching terminal Hi: During FM reception, Lo: During FM seek or AF search
O BEEP sound output
Data input from the remote control light sensor or
I
wired remote control
I/O CH/AUX inputs selector terminal
O N/F selector terminal
I/O Data line with IC2,CD mechanism MI-COM.
I/O Clock line with IC2,CD mechanism MI-COM.
I/O Pre-out mute control terminal
O N-F pre-out mute control terminal
O Dimmer control output
- Test terminal
O Power IC SVR control output
O Power IC mute output
O Power IC STBY control output
O Mute control output
I/O SW5V control terminal
I Momentary power down detection input
I ACC detection terminal
O
I Small lights detection input
O
I/O Power control output
O Antenna control output
I Reset input terminal
I Sub clock resonator connection terminal
- Sub clock resonator connection terminal
- Capacitor conection terminal for regulator inside microprocessor
- Main clock resonator connection terminal
I Main clock resonator connection terminal
- Ground connection terminal
- Positive power supply connection terminal
O Internal system clock output
x ao
y
I/O SW14V control terminal
i
I/O Data line with the external display device
I/O Clock line with the external display device
I/O CE line with the external display device
O
8
Hi: During AM reception
Hi: During FM reception, Hi: During FM reception
if with RDS, RDBS
Lo: Standby mode, Hi: Operation mode
Connected to BU 5V lines.
Connected to GND lines.
Not used(N.C.)
Hi: Rear/N-F pre-outs are selected to Front output.
Lo: Rear/N-F pre-outs are selected to Rear output.
Lo: When momentary power down detected, when
M-MUTE input is Lo.
Lo: When momentary power down detected, N-F pre-
outputs selecting or OFF, when M-MUTE inputs is Lo.
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Hi: Dimmer OFF, Pulse wave shape: Dimmer ON
Not used(Connected to GND lines)
Not used(N.C.)
Lo: ALL OFF mode, POWER OFF mode, TEL MUTE on
Hi: Power IC on, ALL OFF mode, Lo: Power IC off
Lo: Mute off, Open: Mute on
Lo: SW5V on, Hi-Z: SW5V off
Hi : When momentary power down detected or BU OFF
Lo : BU ON
Hi: ACC OFF, Lo: ACC ON
Not used(N.C.)
Lo: During vehicle small lamps turn on.
Not used(N.C.)
Hi-Z: POWER OFF mode, ALL OFF mode, Hi:
POWER ON mode
Hi: During TUNER mode, TI reception mode, last
FM mode
Lo: System reset
Clock count during POWER OFF mode
Oscillation: POWER ON mode, Oscillation stop:
POWER OFF mode or momentary power down detected
Connected to GND lines.
Connected to BU 5V lines.
Not used(N.C.)
u163
Lo: POWER OFF mode, Hi: POWER ON mode
.
Lo: The model without the external display device
Lo: The model without the external display device
Lo: The model without the external display device
Not used(N.C.)
KDC-M6021/G
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Processing Operation
: Reset
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2 8 9 9
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