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

MICROCOMPUTER'S TERMINAL DESCRIPTION

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