- 5 -
SCHEMATIC DIAGRAM
UD-503
UD-503
1
2
3
4
5
6
7
8
A
B
C
D
E
Z
MAIN PCB (4/6)
0.5mm pitch
30pin
Vertical type
BOOT
MCLK_IN
USB_MUTE
USB_EN
I2C0_SDA
USB_BUS_DETECT
I2C0_SCL
PCM_BCK
USB_DET
USB_PCM
DSD_DATA_L
DSD_BCK
DSD_DATA_R
PCM_DATA
PCM_LRCK
USB_DSD
MCLK_SEL
USB_INT
For USB
3V3_SYS(3.3V USB to reserve circuit)
3V3(3.3V USB to reserve circuit)
Guarding
For NET
For USB PCB
For POWER PCB
G 1
S 2
D 3
For Analog
0.5mm pitch
30pin
Vertical type
For NET
USB PCB I2C Address aah
Guarding
POWER_ON
GNDD
GNDD
GNDD
P5VIO
GNDD
GNDD
P5V
GNDD
GNDD
P5V
GNDD
GNDD
GNDD
P3V3
P3V3
GNDD
GNDD
GNDD
P5V_FPGA
P3V3
GNDD
P3V3IO
GNDD
GNDD
GNDD
GNDD
GNDD
GNDD
GNDD
GNDD
GNDD
GNDD
P3V3
GNDD
P5VIO
GNDD
P5V_FPGA
GNDD
GNDD
GNDD
GNDD
GNDD
GNDD
GNDD
GNDD
GNDD
USB_MUTE
6
USB_XINT
6
I2C_SCL
1,6
I2C_SDA
1,6
I2S_DATA
1
I2S_LRCK
1
I2S_BCLK
1
DSD_RDATA
1
DSD_LDATA
1
DSD_BCLK
1
MCLK1
5
/HP_DET_L
6
/HP_DET_R
6
NET_P_ON
5,6
/NET_RST
5
SDI
6
/NET_CS
4,6
OBCK
5
OSDATA_L
5
OLRCK
5
MCLK3
5
/CTRL_CS
6
/DAC_CS
6
/VOL_CS
6
SI_FPGA
5
/FPGA_CS
5,6
/SDO
5
POWER_ON 3,4,5,6
SCK2
5
ANALOG_IN
6
/NET_P_ON
6
RX_F
2,3
RX
6
POWER_ON
3,4,5,6
NETBCK
1
NETSD0
1
MCLK2
5
LRCK_DSDFR
1
/NETINT
6
SDO
5,6
/NET_CS
4,6
NET_MUTE
6
SCK
5,6
TP43
TP56
R205
1K
L32
N.M.(BLM18PG471SN1)
C176
1000P
C78
0.1U
C64
10U
L31
BLM18PG471SN1
P15
B2B-PH-SM4-TB
1
2
R403
470
P14
B3B-EH
1
2
3
R161
10
TP116
TP35
R171
MMZ1608Y601BT
R153
10
P9
FH12-30S-0.5SV
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
TP53
TP7
R202
10K
U13B
SN74LV125APWR
E
4
Y
6
A
5
TP28
R196
390
TP134
TP19
TP54
TP11
R147
47
R170
47
R212
10K
TP44
TP128
TP42
R394
3.9K
C76
0.1U
R188
47
R194
10
R201
10K
TP24
TP38
R141
10
TP39
L36
BLM18PG471SN1
U14 PC410
A
1
C
3
Vcc
6
Vo
5
GND
4
C73
0.1U
TP37
U19
KB816
1
2
4
3
TP124
R190
470
R204
10
R404
470
TP55
R187
47
U13C
SN74LV125APWR
E
10
A
9
Y
8
TP117
C71
0.1U
TP21
TP30
TP12
TP120
R172
MMZ1608Y601BT
R195
N.M.(10K)
TP129
R163
10
TP135
R154
N.M.(47)
R176
180
TP47
Q5
RTF020P02
R168
180
R155
10
R136
10K
Q4
2SC4081
1
3
2
R185
47
C70
0.1U
C77
0.1U
R145
47
R191
47
TP26
R200
10
TP125
C175
0.1U
L30
BLM18PG471SN1
C79
0.1u
TP32
R160
47
TP113
TP121
TP23
R151
47
U13D
SN74LV125APWR
Y
11
A
12
E
13
V
14
G
7
TP130
R183
180
TP6
R405
470
TP48
R138
10K
TP10
R175
47
R210
33K
U12
Si8655BA-B-IU
VCC1
1
GND1
2
A1
3
A2
4
A3
5
A4
6
A5
7
GND1
8
GND2
9
B5
10
B4
11
B3
12
B2
13
B1
14
GND2
15
VCC2
16
R192
47
R179
MMZ1608Y601BT
U18
KB816
1
2
4
3
R142
0
R209
10
P11
B8B-ZR-SM4-TB
1
2
3
4
5
6
7
8
P10
B11B-ZR-SM4
1
2
3
4
5
6
7
8
9
10
11
R152
N.M.(47)
R139
10
R207
47
R167
N.M.(47)
R164
10
R143
47
R162
47
R211
10K
TP51
R157
10
TP25
R144
0
TP114
TP29
R186
180
TP131
TP49
C75
10U
R156
N.M.(47)
TP15
Q6
2SC4081
1
3
2
R184
47
C170
220P
R166
0
P8
FH12-30S-0.5SV
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
TP136
R148
0
R203
390
R406
470
TP45
TP115
R178
47
R189
47
R182
MMZ1608Y601BT
TP22
+
C177
R169
N.M.(47)
C68
0.1U
C74
10U
R137
10
U17
KB816
1
2
4
3
TP27
R146
0
C174
10U
TP122
P12
B3B-PH-SM4-TB
1
2
3
TP31
TP132
TP52
TP36
R174
0
C72
0.1U
TP14
TP16
R173
180
C67
1000P
TP118
R159
10
L37
BLM18PG471SN1
R206
10K
C69
10U
TP126
TP34
R150
0
R158
N.M.(47)
L35
BLM18PG471SN1
TP46
R165
180
TP8
R208
390
R181
47
C65
1000P
R193
47
R198
390
TP123
R197
10K
L33
BLM18PG471SN1
TP33
R177
0
TP40
TP50
TP133
TP20
R199
10
TP9
C66
10U
TP13
R149
47
TP119
U15
KB816
1
2
4
3
TP41
TP17
TP18
R180
180
R140
MPZ1608S221AT
TP127
U13A
SN74LV125APWR
Y
3
A
2
E
1
390/20V
