Kenwood KDC-MP819 Service Manual page 6

KDC-MP819/X659/Z838
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MICROCOMPUTER'S TERMINAL DESCRIPTION
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Pin No. Pin Name
88 KR1
89 SC REQ
90 NC
91 SC CON
92 NC
93 SOURCE
94 VREF CON
95 MC REQ
96 KS4
97 KS3
98 KS2
99 KS1
100 MC DATA
IC5 (ELECTRIC UNIT: X25-9240-XX)
Pin No. Pin Name
1 MC DATA
2 MC CLK
3 DSI GUIDE
4 EJECT KEY G
TE
L 13942296513
5 EJECT KEY R/G
MC REQ
6
/FLIP DET
7 IC2 SDA
8 IC2 SCL
9 EVDD
10 EVSS
11 PAN RESET O
12 BEEP
13 REMO
14 SVR
15 DIMMER
16 PLL DATA
17 PLL CLK
18 P-STBY
19 P-CON
20 ANT-CON
21 TEST
22 P MUTE
23 PAN5V
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24 EXT-AMP-CON
25 CD MECHA+B I/O CD4.7V ON/OFF output
26 EMUTE
27 BU DET
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I/O Description
I Key return 1 input
O Communication request output to the system MI-COM. Lo: Standby, Hi: Request
O
I Control input from the system MI-COM.
O
I Source key input
O A/D converter reference voltage control output
I Communication request input from the system MI-COM. Hi: Request
I/O Key scan output 4
I/O Key scan output 3
I/O Key scan output 2
I/O Key scan output 1
I Data input from the system MI-COM.
I/O Description
I/O Data input/output with the panel MI-COM.
O Clock output to the panel MI-COM.
I/O DSI control output
O Eject key illumination green control output
O Eject key illumination red/green control output
Communication request output to the panel MI-COM. Hi: Request
I/O
/Flip detection input
I/O Data input/output with IC2, IC5, and IC25
I/O Clock input/output with IC2, IC5, and IC25
- Positive power supply connection terminal
- Ground connection terminal
Reset output to the panel MI-COM.
O BEEP output
I Data input from the wired remote control
O SVR output
I Small lights detection input
I/O Data input/output with F/E
I/O Clock input/output with F/E
O POWER IC STBY output
I/O P-CON output
O ANT-CON output
- Test terminal
O POWER IC mute output
I/O Panel 5V control output
O External amp. control output (in 200msec)
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y
. i
O
I Momentary power down detection input
8
Not used(N.C.)
Hi: Operation mode
Not used(N.C.)
Lo: Key OFF, Hi: Key ON
Hi: Active, Connected to AVREF terminal
Lo: DSI ON, Hi-Z: DSI OFF
Lights on at the panel tilted during POWER ON mode.
Flashing at the panel detached during POWER ON mode.
Lo: ON, Hi-Z: OFF
Lights on at the panel tilted during POWER ON
mode in case of the key illumination green.
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Lo: ON, H-Z: OFF
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Lights on at the panel tilted during POWER ON mode.
/Lo: Panel detached, Hi: Panel attached
Connected to BU 5V lines.
Connected to GND lines.
Lo: Reset or Momentary power down detected
Not used(N.C.)
Lo: During vehicle small lamps turn on
Lo: Power IC OFF, Hi: Power IC ON or ALL OFF mode
Hi-Z: POWER OFF mode or ALL OFF mode, Hi:
POWER ON mode
Hi: During TUNER mode or last FM mode with
RDS/RBDS model
Not used(Connected to GND lines)
Lo: Muting during POWER OFF mode, ALL OFF
mode and TEL MUTE ON
Lo: Panel attached normally, Hi-Z: Panel detached
or tilted
Bass boost OFF__Hi: 160msec, Lo: 40msec
Bass boost LOW__Hi: 130msec, Lo: 70msec
Bass boost HI__ Hi: 100msec, Lo: 100msec
u163
Lo: During CD source selected, Hi-z: Except CD
source selected
.
Not used(N.C.)
Lo: BU ON, Hi: When momentary power down
detected or BU OFF
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Processing Operation
Processing Operation
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2 8 9 9