6
KDC-348U/4751SD/BT41U/BT648U
/U4549/U4549SD/U549BT/X395/X695
MICROCOMPUTER’S TERMINAL DESCRIPTION
●
System
μ
-COM : IC201 (X34- : ELECTRIC UNIT)
Pin No.
Pin Name
I/O
Application
Truth Value
Table
Processing / Operation / Description
1,2
NC
-
Not used
3
AVSS
-
Reference GND for A/D converter
Connects to GND even when A/D converter is
not used
4
VREFH
-
Reference power supply for A/D converter
Connects to +B even when A/D converter is not
used
5
RESET
I
Reset input
6
MODE
I
Mode
Connects to GND
7
IPOD SDA
I/O I2C data input/output for iPod authentication IC
8
IPOD SCL
O
I2C clock output for iPod authentication IC
9
IPOD RST
O
Reset signal for iPod authentication IC
10
ROTARY CW
I
VOL encoder input
Pulse width detection
11
VFD DATA
I/O VFD data input/output
VFD data input/output
12
VFD PAN DATA
I
VFD data input
VFD data input
13
VFD CLK
O
VFD clock output
125kHz
14
ROTARY CCW
I
VOL encoder input
Pulse width detection
15
DVSS
-
GND
16
VFD RST
O
VFD driver reset output
H: Reset cancelled, L: Reset
Momentary power down or panel detached or
11 minutes after ACC OFF: L
17
VFD CE
O
VFD control request
18
PON SW3
I/O SW3.3V control
ON: L, OFF: Hi-Z
19
BSIF LRCK
O
BS LRCK output
20
BSIF BCK
O
BS BCK output
21
BSIF DATA
O
BS DATA output
22
BSIF GATE
O
Data transfer starting signal
23
BSIF ST REQ
I
Data input request signal
24
MIC SW
O
BT microphone switching (KDC-BT648U)
L: Panel microphone, H: Rear microphone
25
PON PANEL3
I/O PAN3.3V control
ON: L, Momentary power down or panel de-
tached or 11 minutes after ACC OFF: Hi-Z
26
NC
-
Not used
Output L
fi
xed
27
PANEL DET
I
Panel connection detection
H: No panel, L: Panel attached
28
NC
-
Not used
Output L
fi
xed
29
CD BREAK
O
CD motor brake
q
Refer to the truth value table
30
CD LOEJ
O
CD motor control
q
Refer to the truth value table
31
CD PON
I/O CD mechanism power supply control output
H: Power supply ON, Hi-Z: Power supply OFF
32
CD LOE LIM SW
I
CD detection (Chucking SW)
H: Loading completed, L: No disc
33
CD SRAM STBY
O
Decoder SRAM standby control
L: SRAM standby
34
CD REQ
I
Communication request from mechanism DSP
H: Data request
35
CD LOS SW
I
CD loading detection
36
CD SO
O
Serial interface transmission
37
CD SI
I
Serial interface reception
38
CD CLK
O
Serial interface clock output
1MHz
39
BEEP
O
Beep output
2kHz/1kHz
40
CD DISC12 SW
I
12cm disc detection
