Apalis Carrier Board Design Guide
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Page | 24
Figure 17: Separation of magnetics ground
Figure 18: Gigabit Ethernet with discrete magnetics reference schematic
2.4.2.3
10/100Mbit Ethernet Schematic Example (Integrated Magnetics)
The Fast Ethernet interface uses the MDI0 as transmitting lanes and the MDI1 as receiving lane. As
most Ethernet PHYs feature Auto-MDIX, the signal direction RX and TX could be swapped. It is
strongly recommending that RX and TX lanes are not swapped in order to ensure compatibility
between all Apalis modules.
The MDI2 and MDI3 lanes are not used for the 10/100Base-TX interface. These signals can be left
unconnected.
Digital GND
Shield GND
Magnetics GND
DMI Signals from
Apalis Module
Magnetics
Ethernet
Jack
(RJ-45)
LINK LED
ACT LED
>2mm
100nF
16V
C6
100nF
16V
C7
100nF
16V
C8
2A
220R@100MHz
L1
GND
150R
R6
150R
R5
SHIELD
MM70-314-310B1
ET
50
Apalis - Gigabit Ethernet
2 of 25
ETH1_MDI0-
48
ET
56
ETH1_MDI1-
54
ET
32
ETH1_MDI2-
34
ET
38
ETH1_MDI3-
40
ETH1_ACT
42
ETH1_LINK
44
ETH1_CTREF
46
X1B
ETH1_MDI0_N
ETH1_MDI1_P
ETH1_MDI1_N
ETH1_MDI2_P
ETH1_MDI2_N
ETH1_MDI3_P
ETH1_MDI3_N
ETH1_MDI0_P
ETH1_ACT
ETH1_LINK
ETH1_CTREF
ETH1_MDI0_N
ETH1_MDI1_P
ETH1_MDI1_N
ETH1_MDI2_P
ETH1_MDI2_N
ETH1_MDI3_P
ETH1_MDI3_N
ETH1_MDI0_P
ETH1_ACT
ETH1_LINK
ETH1_CTREF
ETH1_ACT_C
ETH1_LINK_C
ETH1_CTREF_1
ETH1_CTREF_0
ETH1_CTREF_2
ETH1_CTREF_3
ETH1_CTREF_0
ETH1_CTREF_3
ETH1_CTREF_2
ETH1_CTREF_1
0R
R7
0R
R8
100nF
16V
C4
100nF
16V
C5
ETH1[0..10]
0R
R9
0R
R10
GND
GND
GND
GND
3.3V_SW
3.3V_SW
ETH1_CTREF_ALL
47uF
6.3V
+C3
GND
1nF
50V
C2
GND
H5019NL
TCT1
1
TD1+
2
TD1-
3
TCT2
4
TD2+
5
TD2-
6
TCT3
7
TD3+
8
TD3-
9
TCT4
10
TD4+
11
TD4-
12
MCT1
24
MX1+
23
MX1-
22
MCT2
21
MX2+
20
MX2-
19
MCT3
18
MCT4
15
MX3+
17
MX3-
16
MX4+
14
MX4-
13
IC1
RJHSE-5384-ND
LED_R_C
9
LED_R_A
10
S
S2
S
S1
TRD1+
1
TRD1-
2
TRD2+
3
TRD3+
4
TRD2-
6
TRD3-
5
TRD4+
7
TRD4-
8
LED_L_C
11
LED_L_A
12
X2
R1
75R
R2
75R
R3
75R
R4
75R
1nF
2000V
C1
SHIELD
NA
NA
NA
NA
NA
NA
NA