W5100S_外置变压器RJ45参考电路1
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2022-08-03
23:05:01
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A A
WIZnet Co., Ltd.
5F, Humax Village
Hwangseaul-ro, Bundang-gu
Seongnam-si, Gyeongi-do
South Korea
W5100S Reference Schematic
R1
2018-05-04
Title
Size: Number:
Date:
Team:
Revision:
Sheet of
A4
Drawn By:CS
11
*
GNDA
1
TXON
2
TXOP
3
1V2A
4
RXIN
5
RXIP
6
GNDA
7
3V3A
8
RSET_BG
9
GND
10
XSCO
11
XSCI
12
1V2D
13
1V2O
14
3V3A
15
GNDA
16
LNKn
17
SPDn
18
DPXn
19
ACTn
20
COLn
21
1V2D
22
GND
23
3V3D
24
MOD0
25
MOD1
26
MOD2
27
MOD3
28
CSn
29
SCLK
30
1V2D
31
MOSI/A0
32
MISO/A1
33
RDn
34
WRn
35
3V3D
36
DAT0
37
DAT1
38
DAT2
39
DAT3
40
DAT4
41
DAT5
42
DAT6
43
DAT7
44
1V2D
45
GND
46
INTn
47
RSTn
48
WIZnet
W5100S
LQFP48
U3
W5100S
R22
12.3K 1%
C6
0.1uF
GND
3V3D1V2D1V2A 3V3A
GND
D0
D1
D2
D3
D4
D5
D6
D7
CSn
SCLK
MOSI/A0
MISO/A1
INTn
RSTn
RDn
WRn
LNKn
SPDn
DPXn
ACTn
COLn
D[7..0]
D[7..0]
RSTn
R10
49.9
R11
49.9
R16
49.9
R17
49.9
C7
0.1uF
GND
R12 3.3
R13 3.3
R14 3.3
R15 3.3
TX_P
TX_N
RX_P
RX_N
C9
1uF
C8
0.1uF
GNDGND
R18
330
R19
330
LNKn
ACTn
3V3D
1V2A 1V2D
C15
0.1uF
C10
0.1uF
C14
3.3uF
3V3D1V2D 1V2A 3V3A
C18
0.1uF
C16
0.1uF
C11
0.1uF
C12
0.1uF
C13
0.1uF
GND
1V2O
1V2O
C17
0.1uF
GND
C19
0.1uF
GND
Decoupling capacitors
3V3D 3V3A
R20
1M
Y1
25Mhz
R21
0
C20
8pF
C21
8pF
GND
Power noise decrease circuits
SPDn
DPXn
COLn
L1
IND-0805
L2
IND-0805
MDI_T_P
MDI_T_N
MDI_R_P
MDI_R_N
CH_GND
GND CH_GND
C5
1nF/2KV
INTn
RDn
WRn
CSn
SCLK
MOSI/A0
MISO/A1
R3
10K
GND
R16
10K
3V3D
(2)
(2) When MOD[2] is HIGH then W5100S operates with BUS mode. If LOW, W5100S operates in SPI mode.
(6)
(3) Decoupling capacitors should be placed close to W5100S.
(1)
(1) The differenctial signals on both TX/RX should have equal length and be close to each other, if possible.
(3)
(4) To avoid the 100M overshoot, please place the 49.9 resistors and 0.1uF capacitor near the MDI pin of W5100S.
(4)
(5) RSET_BG is the most important analog pin and users should keep the noisy source away from this pin.
(5)
(6) Option - Apply damping resistors for EMI reduction.
!!NOTE!!
GND
TX+
R1
TX-
R2
RX+
R3
NC
R4
NC
R5
RX-
R6
NC
R7
NC
R8
Green_A
L4
Green_C
L3
Yellow_A
L2
Yellow_C
L1
CHGND
R10
CHGND
R9
P1
RD11-ZZ-0012
1
2
3
6
7
8
NC
4
NC
5
TX+
TCT
TX-
RX+
RCT
RX-
TX: 1CT : 1CT
RX: 1CT : 1CT
9
10
11
14
15
16
NC
12
NC
13
T1
L21T003
R1
75
R2
75
R4
75
R5
75
GND
(7)
(7) As close to transformer 2,7 pin as possible
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