There are a number of strobe signals from the GEM to the FPGA fabric. These signals indicate the transmission/reception of various PTP frames. The following table lists these signals.
| Signal Name | Description |
|---|---|
| DELAY_REQ_RX | Asserted when the PTP RX delay request is detected. |
| DELAY_REQ_TX | Asserted when the PTP TX delay request is detected. |
| PDELAY_REQ_RX | Asserted when the PTP PDELAY RX request is detected. |
| PDELAY_REQ_TX | Asserted when the PTP PDELAY TX request is detected. |
| PDELAY_RESP_RX | Asserted when the PTP PDELAY RX response request is detected. |
| PDELAY_RESP_TX | Asserted when the PTP PDELAY TX response request is detected. |
| SOF_RX | Asserted on SFD, de-asserted at EOF. |
| SOF_TX | Asserted on SFD, de-asserted at EOF. |
| SYNC_FRAME_RX | Asserted when the SYNC_FRAME RX response request is detected. |
| SYNC_FRAME_TX | Asserted when the SYNC_FRAME TX response request is detected. |