Microcomputer's Terminal Description - Kenwood KDC-348U Service Manual

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