Integration
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
.
1169
SPRUH73H – October 2011 – Revised April 2013
Ethernet Subsystem
Copyright © 2011–2013, Texas Instruments Incorporated