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NI sbRIO-9651 System on Module Carrier Board Design Guide
GBE0 Implementation on the Reference Carrier Board
Figure 1-1 shows a schematic design for the GBE0 implementation on the reference carrier
board.
Figure 1-1.
GBE0 Reference Schematic
Reference Schematic Design Considerations
Table 1-2 lists design considerations for the schematic shown in Figure 1-1.
Table 1-2.
GBE0 Reference Schematic Design Considerations
Consideration
Notes
MDI data pairs
• The MDI data pairs are routed differentially and connected directly to
the Ethernet connector.
• The Ethernet connector has the required Ethernet magnetics built into
it. You may use discrete magnetics instead.
LED signals
• The LED signals can be used to directly drive connector LEDs.
• The current-limiting resistors must be sized so that the drive current of
the LED signals is not exceeded.
• Refer to the
Ethernet Speed LED Behavior
section of the
NI sbRIO-9651 System on Module OEM Device Specifications
for
information about Ethernet LED signal behavior and rated drive
current.
GBE0_MDIO_P
GBE0_MDIO_N
GBE0_MDI1_P
GBE0_MDI1_N
GBE0_MDI2_P
GBE0_MDI2_N
GBE0_MDI
3
_P
GBE0_MDI
3
_N
GBE0_
S
PEED_LEDg
GBE0_ACT_LEDg
GBE0_
S
PEED_LEDy
14
1
3
16
15
12
6
1
7
10
11
5
4
2
3
9
8
17
18
J
3
LED2(GRN-AN/YEL-CATH)
08261K1T-4
3
-F
LED2(GRN-CATH/YEL-AN)
LED1(GRN-AN)
LED1(GRN-CATH)
S
HIELD1
S
HIELD2
MDIA_P
MDIA_N~
MDIB_P
MDIB_N~
MDIC_P
MDIC_N~
MDID_P
MDID_N~
MCTA
MCTB
MCTC
MCTD
2
2
2
2
2
2
2
2
2
1
C7
0.1UF
10%
16V
2
1
C8
0.1UF
10%
16V
2
1
C2
0.1UF
10%
16V
2
1
C4
0.1UF
10%
16V
2
2
2
R5
475 1%
1/16 W
475 1%
1/16 W
R6
2
1
2
1