5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
Notes:
1) RX and TX signal pairs shall have a differntial impedance of 100 Ohm.
2) Do not mount R1, R2, R5 and R6 if SD interface is not used.
Left port, seen from the front side
Right port, seen from the front side
Port B
Port A
2
2
2
1
1
U1, pin #7
U1, pin #3
J1, pin #1
J1, pin #51
U2, pin #7
U2, pin #3
3V3
3V3
3V3
3V3
3V3
3V3
3V3
3V3
3V3
3V3
3V3
3V3
3V3
3V3
3V3
3V3
U1
QFBR-5978Z
S
D
A
1
R
x
GN
D
2
R
x
V
C
C
3
S
D
4
R
D
-
5
R
D
+
6
T
x
V
C
C
7
T
x
GN
D
8
T
x
D
IS
9
T
D
+
1
0
T
D
-
1
1
S
C
L
1
2
GN
D
#
1
3
1
3
GN
D
#
1
4
1
4
R4
150R
R3
150R
C3
100nF/16V
R2
0R
C5
10uF/10V
C1
10uF/10V
C12
4u7F/6V3
C17
100nF/16V
C18
100nF/16V
C2
100nF/16V
R10
4k7
C11
100nF/16V
R6
820R
R11
4k7
R9
150R
R12
4k7
C15
100nF/16V
R13
4k7
U2
QFBR-5978Z
S
D
A
1
R
x
GN
D
2
R
x
V
C
C
3
S
D
4
R
D
-
5
R
D
+
6
T
x
V
C
C
7
T
x
GN
D
8
T
x
D
IS
9
T
D
+
1
0
T
D
-
1
1
S
C
L
1
2
GN
D
#
1
3
1
3
GN
D
#
1
4
1
4
R8
150R
C8
4u7F/6V3
C4
4u7F/6V3
C7
100nF/16V
C16
100nF/16V
C10
4u7F/6V3
C9
100nF/16V
R5
820R
R1
0R
J1
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
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
C6
100nF/16V
B_SDPA
A_SDPA
A_SDN
A_RXPA
A_RXNA
B_RXPA
B_RXNA
A_2CEN/SCL
B_2P/SDP
B_1N/RXN
B_2N/SDN
B_3P/TXEN
B_3N/TXDIS
B_4P/TXP/TX
B_4N/TXN/TX_N
B_TXN
B_1P/RXP
A_1N/RXN
A_1P/RXP
A_2N/SDN
A_2P/SDP
B_1CEN/SDA
B_2CEN/SCL
B_3CEN/RX
B_4CEN/CD/BUSP_N
NW_LED1B_N
NW_LED1A_N
NW_LED2B_N
NW_LED3A_N
NW_LED2A_N
NW_LED3B_N
NW_LED4A_N
NW_LED4B_N
C_TX
C_TXEN
C_BUSP_N
C_RX
GATE1
GATE2
A_3P/TXEN
A_3N/TXDIS
A_4P/TXP/TX
A_4N/TXN/TX_N
A_1CEN/SDA
A_4CEN/CD/BUSP_N
A_3CEN/RX
B_SDN
A_TXN
B_SDP
B_RXN
B_RXP
B_TXP
B_SDA
B_SCL
B_TXDIS
A_SDA
A_SCL
A_TXDIS
A_SDP
A_RXN
A_RXP
A_TXP
Design Example
Ethernet Fibre Optics
Network Interface