If you want to apply synchronous reset on the RX user logic, follow the steps below:
1. Assert reset signals of Triple-Speed Ethernet (TSE) IP and RX user logic at the same time.
2. De-assert reset signal of TSE IP first.
3. Once clock detection circuit detects that clock signal from mac_rx_clk_0 begins to toggle, de-assert resets signal of RX user logic a few clocks later.