ZERO SOM/ZERO Hardware/Peripherals/Ethernet

History
Issue Date	Notes
2025/06/11	First release

Peripheral Ethernet

The Ethernet interfaces available on ZERO is based on RZ/T2H SoC and the Ethernet subsystem consists of Ethernet MAC (GMAC), Ethernet Switch (ETHSW), EtherCAT Slave Controller (ESC) and RGMII/RMII converters. The MAC-PHY interfaces support RGMII, MII, and RMII.

Description

• The Ethernet MAC (GMAC) has the following features
  • 3 ports: GMAC0, GMAC1, GMAC2
  • 10/100/1000-Mbit/s data transfer (10/100 full duplex or half duplex, 1000 full duplex)
  • IEEE802.3, IEEE1588-2008 and IEEE802.3-az-2010 for EEE
  • advanced IEEE 1588-2002 & 2008 Ethernet frame time-stamping
  • TSN features (IEEE802.1Qbv, IEEE802.1Qbu/802.3br)
  • VLAN Filtering, L3 and L4 Filtering
• The Ethernet switch (ETHSW) - IEEE802.3 - has
  • 3-port PHY interfaces
  • Full and half duplex (1000 Mbps supports full-duplex only)
  • Hardware switching, lookup, and filtering
  • QoS with frame prioritization
  • Priority control based on VLAN Priority (IEEE802.1q)
  • Multicasting and broadcasting
  • VLAN frame
  • IEEE 1588-2008 compatible
  • Frame preemption
  • Forwarding rule for the TSN-IA profile
  • MAC source address filtering
  • Independent two timer modules are available for timestamping and time for TDMA
  • Ingress filtering and frame header manipulation (active stream identification, flow metering) with Enhanced Frame Parser
  • Additional PTP timer pulse generators
• The EtherCAT slave controller (ESC) is based on an EtherCAT Slave Controller IP core (made by Beckhoff Automation GmbH)
  • 1 channel (with 3 MII ports)
  • MII interface is supported: RMII/RGMII interface is supported by RGMII converter

Important note for the external magnetic connection

The Ethernet peripherals require an external magnetic insulator on the carrier board.

Pin mapping

The Pin mapping is described in the Pinout table section