Latency Values – Simulation - 7.2 English

AXI 1G/2.5G Ethernet Subsystem Product Guide (PG138)

Document ID
PG138
Release Date
2023-11-15
Version
7.2 English
  1. Transmitter path
    1. MAC latency: 48 ns
    2. PCS latency: 64 ns
    3. GT Latency: 77 ns

      Total TX latency: 1.a + 1.b + 1.c = 48 + 64 + 77 = 189 ns

      Value in hex for TX latency: 0xBD

  2. Receiver path
    1. MAC latency: 8 ns
    2. PCS latency: 56 ns
    3. GT latency
      1. GT latency from RXP to parallel data: 163 ns
      2. GT latency barrel shifter: 18 ns

        Calculated GT latency: 2.c.i – 2.c.ii = 163 -18 = 145 ns.

        Total RX latency: 2.a + 2.b + 2.c = 8 + 56 +145 = 209 ns

        Value in hex for RX latency: 0xD1