5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
RS-232 TRX
Ethernet
AUDIO IN
5
10
4
7
8
1
5
1
2
3
9
6
9
7
4
8
6
1
7
3
2
8
9
IDC-10
4
5
1
6
DB9
2
8
9
2
7
3
6
AT-Everex Configuration
5
4
3
6. Audio / UART / Ethernet / SDIO /GPIO
SD-Card
SD / MMC ESD protection
VIO --> 3.3V Level Translator
Differential Pair,
Length Match: +/- 100 mils
Differential Impedance: 100 ohms
LAYOUT NOTE:
AUDIO OUT
(Can be omitted in VAR-SOM-AM35 designs)
Debug Connector
GPIO/UART1 VIO <--> 3.3V Level Translator
HP5
HP6
HP4
HP7
UART3_RTS_B
UART3_TX_B
UART3_CTS_B
UART3_RX_B
UART3_CTS_C
UART3_RX_C
UART3_TX_C
UART3_TX_B
UART3_RTS_B
UART3_RX_B
UART3_CTS_B
UART3_RTS_C
UART3_RTS_C
UART3_CTS_C
UART3_TX_C
UART3_RX_C
MMC1_CMD
MMC1_DAT0
MMC1_DAT2
MMC1_DAT3
MMC1_DAT1
SD_W P
MMC1_CD
MMC1_CLKO
MMC1_DAT2
MMC1_DAT3
MMC1_DAT0
MMC1_DAT1
MMC1_CMD
HP8
HP2
UART1_RX_GPIO_151_3V3
UART1_TX_GPIO_148_3V3
UART1_RX_GPIO_151_3V3
UART1_TX_GPIO_148_3V3
UART1_RTS_GPIO_149_3V3
UART1_CTS_GPIO_150_3V3
UART1_RTS_GPIO_149_3V3
UART1_CTS_GPIO_150_3V3
AUD_GND
VCCA_3V3
AUD_GND
VIO
VCC_5V
VIO
VCC_3V3
VCC_3V3
AUD_GND
AUD_GND
AUD_GND
AUD_GND
VCC_SD
VCC_3V3
VCC_SD
VCC_5V
AUD_GND
VIO
VCC_5V
AUD_GND
VIO
VCC_3V3
AUD_GND
AUD_GND
VCCA_3V3
VCC_3V3
VIO
VCC_3V3
VIO
VCC_3V3
VCC_5V
AUD_GND
VIO
VCC_3V3
VIO
VCC_3V3
ETH_TXP
2
ETH_TXN
2
HP_LOUT
2,4
HP_ROUT
2,4
UART3_TX
2
UART3_RTS
2
UART3_RX
2
UART3_CTS
2
MMC1_DAT3
2,4
MMC1_CMD
2,4,5
MMC1_DAT2
2,4
MMC1_DAT1
2,4
MMC1_DAT0
2,4
MMC1_CLKO
2,4
AUD_EN
2
CODEC_LINEIN_R
2,4
CODEC_LINEIN_L
2,4
MMC1_CD
2,4
SD_W P
2
ETH_RXP
2
ETH_RXN
2
LINK_LED
2
SPEED_LED
2
UART1_TX
4
UART1_RTS
4
UART1_RX
4
UART1_CTS
4
Title
Size
Document Number
Rev
Date:
Sheet
of
Approved By:
Designer:
Project
VAR-OM35CustomBoard v2.21
2.3
6. Audio, UART,Ethernet ,SDIO /GPIO
A3
6
8
Thursday, August 18, 2011
<Designer>
<Approved By>
VAR-OM3XCustomBoard
Title
Size
Document Number
Rev
Date:
Sheet
of
Approved By:
Designer:
Project
VAR-OM35CustomBoard v2.21
2.3
6. Audio, UART,Ethernet ,SDIO /GPIO
A3
6
8
Thursday, August 18, 2011
<Designer>
<Approved By>
VAR-OM3XCustomBoard
Title
Size
Document Number
Rev
Date:
Sheet
of
Approved By:
Designer:
Project
VAR-OM35CustomBoard v2.21
2.3
6. Audio, UART,Ethernet ,SDIO /GPIO
A3
6
8
Thursday, August 18, 2011
<Designer>
<Approved By>
VAR-OM3XCustomBoard
C93
1uF
C93
1uF
U18
ESD
U18
ESD
4
2
5
3
1
6
U22
MAX232D
U22
MAX232D
R1IN
13
R2IN
8
T1OUT
14
T2OUT
7
c2+
4
c2-
5
R1OUT
12
R2OUT
9
T1IN
11
c1-
3
T2IN
10
c1+
1
VCC
16
V-
6
GND
15
V+
2
R112
10K
R112
10K
C72
100nF
C72
100nF
C94
1uF
C94
1uF
C91
100pF
C91
100pF
U20
ESD
U20
ESD
4
2
5
3
1
6
R57
510
R57
510
C86
100nF
C86
100nF
R106
10K
R106
10K
R59 510
R59 510
R202
4.02K
R202
4.02K
C79
1uF
C79
1uF
C88
1uF
C88
1uF
C28
1uF
C28
1uF
VCCA <= VCCB
U33
TXS0102DCTR
VCCA <= VCCB
U33
TXS0102DCTR
B2
1
GND
2
VCCA
3
A2
4
A1
5
OE
6
VCCB
7
B1
8
C75
100nF
C75
100nF
+
C26
47uF
+
C26
47uF
1
2
R203
4.02K
R203
4.02K
J7
MMC-SD Connector
J7
MMC-SD Connector
CD/DAT3
1
CMD
2
VSS1
3
VDD
4
CLK
5
VSS2
6
DAT0
7
DAT2
9
DAT1
8
W
P
1
1
C
D
1
0
SHLD1
12
SHLD2
13
C74
100nF
C74
100nF
R102
1K
R102
1K
C101
100nF
C101
100nF
R100
10K
R100
10K
R204
4.02K
R204
4.02K
C102
100nF
C102
100nF
C82
100nF
C82
100nF
J16
HEADER 5X2
J16
HEADER 5X2
10
8
6
4
2
9
7
5
3
1
R66 10K
R66 10K
R101
10K
R101
10K
R205
4.02K
R205
4.02K
R96
10K
R96
10K
R68
10K
R68
10K
C27
100pF
C27
100pF
J14
STEREO JACK
J14
STEREO JACK
1
2
3
R99
33R
R99
33R
C95
220pF
C95
220pF
C90
100nF
C90
100nF
VCCA <= VCCB
U34
TXS0102DCTR
VCCA <= VCCB
U34
TXS0102DCTR
B2
1
GND
2
VCCA
3
A2
4
A1
5
OE
6
VCCB
7
B1
8
C97
100nF
C97
100nF
C87
1uF
C87
1uF
R97
10K
R97
10K
C24
1uF
C24
1uF
C84
1uF
C84
1uF
C99
100nF
C99
100nF
R111
1K
R111
1K
R108
0R
R108
0R
C92
1uF
C92
1uF
C98
10uF
C98
10uF
R98
10K
R98
10K
C96
220pF
C96
220pF
+
C25
47uF
+
C25
47uF
1
2
+
C80
100uF
+
C80
100uF
1
2
C100
100nF
C100
100nF
U9
TPA6111A2DR
U9
TPA6111A2DR
BYPASS
3
G
N
D
4
V
D
D
8
VO2
7
VO1
1
IN2-
6
IN1-
2
S
H
U
T
D
O
W
N
5
Q4
NTR3161N
Q4
NTR3161N
1
3
2
J6
RJ45 W G/Y
J6
RJ45 W G/Y
SH1
S1
SH2
S2
TD+
1
TD-
2
RD+
3
CT
4
CT
5
RD-
6
NC
7
CHS
8
Y-
11
Y+
12
G-
10
G+
9
R110
1K
R110
1K
C29
100nF
C29
100nF
J15
STEREO JACK
J15
STEREO JACK
1
2
3
'0'-
B->A
U19
SN74AVC4T245
'0'-
B->A
U19
SN74AVC4T245
VCCA
1
1DIR
2
2DIR
3
1A1
4
1A2
5
2A1
6
2A2
7
GND
8
GND
9
2B2
10
2B1
11
1B2
12
1B1
13
2OE#
14
1OE#
15
VCCB
16
R67
10K
R67
10K
