Tool/software:
Hello,
Here is a summary of available information about RGMII Shift and Align mode for our DP83TC81x devices:
- A minimum of 1ns setup and 1ns hold time must be maintained at the input of the receiver.
- The delay can be added by PCB traces, by the PHY or by the MAC
- Either way, it is based on the RGMII input timing specifications and must be maintained.
- RGMII shift mode means there is an added delay. RGMII align mode means there is no added delay.
- TX Delay
- TX + RX delay
- CLK Shift registers
- The maximum programmable delay by our PHYs is 5 ns and the default is 2.5 ns.