The following table lists the clocks that are present in the DCMAC Subsystem.
| Clock | Port | Description | Nominal Frequency Range (MHz) 1 | Overclocked Rate (MHz) Superscript 2 |
|---|---|---|---|---|
| AXI4-Lite | s_axi_clk | AXI4-Lite processor interface clock. | 50 - 300 | 300 |
| AXI |
tx_axi_clk rx_axi_clk |
AXI4-Stream interface clocks. These clocks are used by the AXI4-Stream interface. They are also used by a number of device statistics and flow control signals. | 195.3125 - 390.625 | 415.2512 |
| core |
tx_core_clk rx_core_clk |
High-speed clocks which drive internal core logic. | 390.625 -782 | 830.502 |
| serdes | tx_serdes_clk[5:0] rx_serdes_clk[5:0] |
Per-port high-speed clocks for the GT interface. | 644.5313 - 664.0625 | 705.25 3 |
| 700 4 | ||||
| alt_serdes | tx_alt_serdes_clk[5:0] rx_alt_serdes_clk[5:0] |
Per-port alternate low-frequency clocks for the GT interface. | 322.2656 - 332.0313 | 352.625 3 |
| 350 4 | ||||
| gt_usrclk | gt_tx_usrclk[5:0] gt_rx_usrclk[5:0] | Per-port GT Interface clock. Applicable only for 256-bit (Full Density) configs. | 415.039 | 437.5 |
| flexif | tx_flexif_clk[5:0] rx_flexif_clk[5:0] |
Per-port FLEX I/F clocks. | 312.50 - 390.625 | 427.4242 |
| macif | tx_macif_clk rx_macif_clk |
MAC I/F clocks. | 260.4167 - 390.625 | 415.2512 |
| ts |
ts_clk[5:0] |
Per-port clocks for the timestamp interface. | 50 - 350 | 350.000 |
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