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14.2.3 Ethernet Switch Pin List
The external signals for the Ethernet Switch module are shown in the following table.
Table 14-4. Ethernet Switch Pin List
Pin Type* Description
GMIIx_RXCLK I GMII/MII Receive clock
GMIIx_RXD[7:0] I GMII/MII Receive data
GMIIx_RXDV I GMII/MII Receive data valid
GMIIx_RXER I GMII/MII Receive error
GMIIx_COL I GMII/MII Collision detect
GMIIx_CRS I GMII/MII Carrier sense
GMIIx_TXCLK I GMII/MII Transmit clock
GMII_TXD[7:0] O GMII/MII Transmit data
GMIIx_TXEN O GMII/MII Transmit enable
RGMIIx_RCLK I RGMII Receive clock
RGMIIx_RCTL I RGMII Receive control
RGMIIx_RD[3:0] I RGMII Receive data
RGMIIx_TCLK O RGMII Transmit clock
RGMIIx_TCTL O RGMII Transmit control
RGMIIx_TD[3:0] O RGMII Transmit data
RMIIx_RXD[1:0] I RMII Receiver data
RMIIx_RXER I RMII Receiver error
RMIIx_CRS_DV I RMII Carrier sense / Data valid
RMIIx_TXEN O RMII Transmit enable
RMIIx_REFCLK I/O RMII Reference clock
RMIIx_TXD[1:0] O RMII Transmit data
MDIO_MCLK O MDIO Serial clock
MDIO_MDIO I/O MDIO Serial data
14.2.4 Ethernet Switch RMII Clocking Details
The RMII interface reference clock pin operates as an input. When used as an input, the clock is driven by
the I/O pad. The operation is controlled by the GMII_SEL[RMIIx_IO_CLK_EN] fields in the Control Module,
as shown in Figure 14-2.
1169
SPRUH73H–October 2011–Revised April 2013 Ethernet Subsystem
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