Microcomputer's Terminal Description - Kenwood KDC-X679 Service Manual

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MICROCOMPUTER'S TERMINAL DESCRIPTION

3 7 63 1515 0
SYSTEM MICROCOMPUTER : 30624MGPA27GP (X34 : IC1)
Pin No. Pin Name
1~4 NC
5 OPEL_REMO
6 BYTE
7 CNVSS
8 XCIN
9 XCOUT
10 RESET
11 XOUT
12 VSS
13 XIN
14 VCC1
15 NMI
16 ES_SW
17 NC
18 LX_REQ_S
TE
19 PON_AM
L 13942296513
20 MUTE_LEVEL
21 TUN_IFC_OUT
22 RDS_AFS_L
23 RDS_AFS_M
24,25 NC
26 PWIC_BEEP
27 TUN_SCL
28 TUN_SDA
29 PAN_DATA
30 PAN_CLK
31 PAN_SCREQ
32 PAN_PNREQ
AUD_SDA
33 IC5_SDA
CD_SDA
AUD_SCL
34 IC5_SCL
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CD_SCL
35 PON_PAN
.
Module I/O Application
O Not used
EXTRA I External display remote control input
-
Used when writing to system µcom
I
I Sub clock input (32.768kHz)
I Sub clock output (32.768kHz)
- Reset terminal
- Main clock output (16.0MHz)
-
- Main clock input (16.0MHz)
-
I Not used
EXTRA O Not used
I Not used
LX_M I Communication request from slave unit
TUNER O AM power supply control
EXTRA O LEVEL_METER MUTE terminal
TUNER I F/E IFC OUT input terminal
TUNER I/O Constant switching at noise detect
TUNER I/O Constant switching at noise detect
I Not used
PWIC O Beep output
TUNER I/O F/E I2C clock output terminal
TUNER I/O F/E I2C data input/output terminal
to PANEL I/O Between-panel communication (Bi-directional)
to PANEL I/O Between-panel communication clock
Between-panel communication request
to PANEL I/O
termnal (Used also for PN_DET)
to PANEL I Between-panel communication request terminal
AUDIO I/O E-VOL I2C data input/output terminal
AUDIO I/O IC5 data output terminal
CD I/O CD mechanism I2C data input/output terminal
AUDIO I/O E-VOL I2C clock output terminal
AUDIO I/O IC5 clock output terminal
CD I/O CD mechanism I2C clock output terminal
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y
Power supply I/O Panel 5V control terminal
i
2 9
8
Truth Value
Table
Output : L
Not used
0V GND direct connection
Pull down
L : Reset
Q Q
AM operation : H, Non-AM operation : L
3 6 7 1 3 1 5
Mute ON : H, Mute OFF : L
H : Station detect, L : No detect
r
Refer to truth value table.
r
Refer to truth value table.
(MAX 400kHz)
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ON : H, Momentary power down, Panel come
.
off and 11 minutes after ACC_OFF : Hi-Z
KDC-X679
9 4 2 8
Processing Operation Description
0 5 8 2 9 9 4 2 8
m
9 9
9 9
5