User Guide

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52
GM500-U1G_A
Hardware Development Guide
6) In order to ensure the signal quality, it is recommended to add pull-ups R7 ~ R11, default NA,on the
SDC2_DATA_[0:3] and SDC2_CMD lines. The resistance range is 10 ~ 100k Ω, recommended 100k Ω.
2.19. SGMII Interface
Table 2-26 Pin Definition of SGMIIInterface
Pin Name Pin NO. I/O Description Comment
EPHY_INT_N 82 DI Ethernet PHY interrupt
1.8V power domain
If do not need this, leave this pin not connected.
EPHY_RST_N 83 DO Ethernet PHY reset
1.8V/2.85V power domain
If do not need this, leave this pin not connected.
SGMII_MDIO_D
ATA
84 IO Management data input
output data
1.8V/2.85V power domain
If do not need this, leave this pin not connected.
SGMII_MDIO_C
LK
85 DO Management data input
output clock
1.8V/2.85V power domain
If do not need this, leave this pin not connected.
SGMII_RX_P 103 AI SGMII RX+ Use 0.1 µF AC coupled capacitor, and place closer to module.
If do not need SGMII, leave this pin not connected.
SGMII_RX_M 104 AI SGMII RX- Use 0.1 µF AC coupled capacitor, and place closer to module.
If do not need SGMII, leave this pin not connected.
SGMII_TX_P 105 AO SGMII TX+ Use 0.1 µF AC coupled capacitor, and place closer to PHY.
If do not need SGMII, leave this pin not connected.
SGMII_TX_M 106 AO
SGMII TX－
Use 0.1 µF AC coupled capacitor, and place closer to PHY.
If do not need SGMII, leave this pin not connected.
VREF_L5 86 PO SGMIIMDIO signal pull up
power
1.8V/2.85V
Only used for SGMII MDIO pull up
If do not need this, leave this pin not connected.