Seco Smarc LEVY User Manual page 40

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3.2.2.12 Gigabit Ethernet signals

Gigabit Ethernet interfaces are realized on the module using two Texas Instruments DP83867CRRGZR Gigabit Ethernet transceivers, which are interfaced to NXP

i.MX 8M Plus processor through RGMII interface.

Here following the signals involved in Gigabit Ethernet #0 management:

GBE0_MDI0+/GBE0_MDI0-: Media Dependent Interface (MDI) Transmit/Receive differential pair

GBE0_MDI1+/GBE0_MDI1-: Media Dependent Interface (MDI) Transmit differential pair

GBE0_MDI2+/GBE0_MDI2-: Media Dependent Interface (MDI) Transmit differential pair

GBE0_MDI3+/GBE0_MDI3-: Media Dependent Interface (MDI) Transmit differential pair

GBE0_LINK_ACT#: Ethernet controller activity indicator. Active Low Output signal, +3.3V_ALW electrical level

GBE0_LINK100#: Ethernet controller 100Mbps link indicator. Active Low Output signal, +3.3V_ALW electrical level

GBE0_LINK1000#: Ethernet controller 1Gbps link indicator. Active Low Output signal, +3.3V_ALW electrical level

GBE0_SDP: Software defined pin, directly managed by TI Gigabit Ethernet PHY transceiver #0. Bidirectional signal, +3.3V_ALW electrical level.

Here following the signals involved in Gigabit Ethernet #1 management:

GBE1_MDI0+/GBE1_MDI0-: Media Dependent Interface (MDI) Transmit/Receive differential pair

GBE1_MDI1+/GBE1_MDI1-: Media Dependent Interface (MDI) Transmit differential pair

GBE1_MDI2+/GBE1_MDI2-: Media Dependent Interface (MDI) Transmit differential pair

GBE1_MDI3+/GBE1_MDI3-: Media Dependent Interface (MDI) Transmit differential pair

GBE1_LINK_ACT#: Ethernet controller activity indicator. Active Low Output signal, +3.3V_ALW electrical level

GBE1_LINK100#: Ethernet controller 100Mbps link indicator. Active Low Output signal, +3.3V_ALW electrical level

GBE1_LINK1000#: Ethernet controller 1Gbps link indicator. Active Low Output signal, +3.3V_ALW electrical level

GBE1_SDP: Software defined pin, directly managed by TI Gigabit Ethernet PHY transceiver #1. Bidirectional signal, +3.3V_ALW electrical level.

Please refer to the following schematics as an example of connection of Ethernet interface on the carrier board, with TVS diodes specifically designed to protect

sensitive components which are connected to high-speed data and transmission lines from overvoltage caused by ESD. In this example, it is also present

GBE_CTREF signal connected on pin #2 of the RJ-45 connector. TI Gigabit Ethernet PHY transceiver

therefore the signal GBE_CTREF is not available on SMARC connector.

LEVY

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