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VOLTAGE
MODEL : DY-3A66U-AL-2-T
(Pin numbers are as measurement points.)
1.
-COM
IC801 PCB-MAIN
AM 999kHz 74dB V, FM 98.1MHz 68dB V
BATT, ACC 13.2V
Pin
Pin Name
Function
No.
1 DISP-SO
Serial data output to DSP
2 DSP-CLK
Serial clock output to DSP
3 M-DATA-IN
M-BUS serial data input
4 M-DATA-OUT
M-BUS serial data output
5 M-CLK
M-BUS clock output
6 Evdd
VDD5V
7 Evss
GND
8 OFFSET
Offset detection mode change output
9 CD-ACC ON
CDX2 ACCON output
10 CD-MTS
communication request output to CDX2
11 CD-STM
communication request input from CDX2
12 CD-DSTM
Serial data input from CDX2
13 CD-DMTS
Serial data output to CDX2
14 CD-CLK
Serial clock input from CDX2
15 -
Not used
16 AM-ON
AM power supply output
17 FM-ON
FM power supply output
18 IC/VPP
GND
19 ACC-5V ON
ACC 5V output
20 ANT-ON
ANT +B output
21 ST
Stereo input
22 SD
Stop level input
23 IF-REQ
IF output request
24 POWER-ON1
Power ON
25 POWER-ON2
Power ON
26 -
Not used
27 -
Not used
28 -
Not used
29 -
Not used
30 -
Not used
31 RESET
System reset input
32 XT1
Sub clock (Not used)
33 XT2
Sub clock (Not used)
34 REGC
Regulator output smoothly capacitor
35 X2
Main clock - 12MHz
36 X1
Main clock - 12MHz
37 Vss
GND
38 Vdd
VDD 5V
39 CLOCKOUT
Clock output (Not used)
40 POWER-KEY
Power-KEY input
41 AUDIO-KEY
Audio-KEY input
42 SW1
Encoder KEY2 input
43 SW2
Encoder KEY1 input
44 VOL1
VOL pulse signal1 input
45 VOL2
VOL pulse signal2 input
46 LED-LATCH
LED driver-IC communication latch output
47 LED-DATA-IN
LED driver-IC communication serial data output
48 LED VDD ON
Panel ON output
49 LED-CLK
LED driver-IC communication serial clock output
50 LED-ENABLE
LED driver-IC movement request output
Note:
*1 : The port is oscillation port. Do not touch it.
*2 : The value is alternated by volume control knob.
*3 : Using PS24 panel.
Voltage [V]
Pin
I/O ACT
Remark
AM
FM
CD
No.
O
L
0
0
0
51 -
O
L
0
0
0
52 -
I
L
5
5
5
53 -
O
L
5
5
5
54 -
I/O
L
5
5
5
55 BVdd
-
-
5
5
5
56 BVss
-
-
0
0
0
57 P-MUTE
O
H
0
0
0
58 CAR-TYPE1
O
H
0
0
0
59 CAR-TYPE2
O
L
5
5
5
60 CAR-TYPE3
I
L
5
5
5
61 CAR-TYPE4
I
L
5
5
5
62 -
O
L
0
0
0
63 DSP-REQ
I
L
5
5
5
64 DSP-RDY
O
L
-
-
-
65 DSP-DRDY
O
H
5
0
0
66 -
O
H
0
5
0
67 DSPO-SRESET
-
-
0
0
0
68 DSP-IRESET
O
H
5
5
5
69 -
O
H
5
5
5
70 DSP-ON
I
L
5
5
5
71 Avdd
I
L
5
5
5
72 Avss
O
H
5
5
5
73 AVREF
O
H
5
5
5
74 A/D KEY1
O
H
5
5
5
75 A/D KEY2
O
L
-
-
-
76 REMO(D/C)
O
L
-
-
-
77 S-METER
I
L
0
0
0
78 CAR-SENCE
O
L
-
-
-
79 INIT1
O
L
-
-
-
80 HSD
-
-
5
5
5
81 RTS
-
-
0
0
0
82 CD-MUTEIN
-
-
-
-
-
83 TEL-MUTE
-
-
3
3
3
84 -
-
-
-
-
-
*1
85 -
-
-
-
-
-
*1
86 ACC-IN
-
-
0
0
0
87 BATT-IN
-
-
5
5
5
88 EJECT-KEY
O
-
-
-
-
89 DSP RDY CHECK DSP rdy terminal check input
I
L
5
5
5
90 M-BUSY
I
L
5
5
5
91 -
I
-
5/0
5/0
5/0
*2
92 -
I
-
5/0
5/0
5/0
*2
93 ALL-MUTE
I
-
5/0
5/0
5/0
*2
94 IIC-DATA
I
-
5/0
5/0
5/0
*2
95 CTS
O
H
0
0
0
96 IIC-CLK
O
L
0
0
0
97 PC-MAIN
O
L
5
5
5
98 MAIN-PC
O
L
0
0
0
99 -
O
L
0
0
0
100 DSP-SI
21
Pin Name
Function
Not used
Not used
Not used
Not used
VDD 5V
GND
Power IC mute control output
Switching car type check terminal
Switching car type check terminal
Switching car type check terminal
Switching car type check terminal
Not used
Communication request output to DSP
Communication possibility input from DSP
Communication possibility input from DSP
Not used
DSPO system reset output
DSPO, DSPI initial reset output
Not used
DSP-IC power control output
A/D converter analog power supply
A/D converter ground power supply
VDD 5V
A/D key1 input
A/D key2 input
Remote controller code input
Electric field level input
Car type change input
Initialization change input
Offset detection input
PC communication request input
CDX2 mute input
Telephone mute input
Not used
Not used
ACC detection input
BATT detection input
Eject key input
M-BUS busy output
Not used
Not used
All mute output
IIC-data output (TUNER, EEPROM)
PC communication request output
IIC clock output (TUNER, EEPROM)
PC communication serial data input
PC communication serial data output
Not used
DSP serial data input
Voltage [V]
I/O
ACT
Remark
AM
FM
CD
O
L
-
-
-
O
L
-
-
-
O
L
-
-
-
O
L
-
-
-
-
-
5
5
5
-
-
0
0
0
O
H
5
5
5
I
L
0
0
0
I
L
0
0
0
I
L
0
0
0
I
L
0
0
0
O
L
-
-
-
O
H
5
5
5
I
H
0
0
0
I
H
5
5
5
O
L
-
-
-
O
L
5
5
5
O
L
5
5
5
O
L
-
-
-
O
H
5
5
5
-
-
5
5
5
-
-
0
0
0
-
-
5
5
5
I
-
5
5
5
I
-
5
5
5
I
-
5
5
5
I
-
3.6
4.3
0
I
-
2.5
2.5
2.5
*3
I
-
5
5
5
I
L
0
0
0
I
L
0
0
0
I
L
0
0
0
I
H
5
5
5
O
L
-
-
-
O
L
-
-
-
I
H
5
5
5
I
L
0
0
0
I
L
5
5
5
I
L
5
5
5
I/O
L
5
5
5
O
L
-
-
-
O
L
-
-
-
O
L
5
5
5
O
L
5
5
5
O
L
0
0
0
O
L
5
5
5
I
L
0
0
0
O
L
0
0
0
O
L
-
-
-
I
L
0
0
0
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