Triple-Speed Ethernet Intel® FPGA IP User Guide

ID 683402
Date 10/04/2021
Public

A newer version of this document is available. Customers should click here to go to the newest version.

Document Table of Contents

6.1.12.3. MII/GMII Clocks and Clock Enablers

Data transfers on the MII/GMII interface are synchronous to the receive and transmit clocks.
Table 108.  MAC Clock Signals
Name I/O Description
rx_clk O Receive clock. This clock is derived from the TBI clock tbi_rx_clk and set to 125 MHz.
tx_clk O Transmit clock. This clock is derived from the TBI clock tbi_tx_clk and set to 125 MHz.
Clock Enabler Signals
Note: The clock enabler signals are present only in SGMII mode.
rx_clkena O Receive clock enabler. In SGMII mode, this signal enables rx_clk.
tx_clkena O Transmit clock enabler. In SGMII mode, this signal enables tx_clk.
Figure 60. Clock Enabler Signal Behavior