Visible to Intel only — GUID: apo1522300295840
Ixiasoft
Visible to Intel only — GUID: apo1522300295840
Ixiasoft
6.5. FlexE and OTN Mode TX Interface
The H-Tile Hard IP for Ethernet IP core TX client interface in FlexE and OTN variations employs the PCS66 interface protocol.
The FlexE and OTN variations allow the application to write 66b blocks to the TX PCS, bypassing the TX MAC.
- In FlexE mode, the TX encoder in the PCS is also bypassed.
- In OTN mode, both the TX encoder and the scrambler are bypassed.
The client acts as a source and the TX PCS acts as a sink in the transmit direction.
Signal Name |
Description |
---|---|
i_tx_pcs66_d[255:0] |
TX PCS 66b data for 4 blocks.
|
i_tx_pcs66_valid |
When asserted, indicates that the TX PCS 66b data is valid. Must be asserted when the TX PCS 66b ready signal is asserted. |
o_tx_pcs66_ready |
TX PCS 66b ready signal. When asserted, indicates the PCS is ready to receive new data. |
i_tx_pcs66_am |
Alignment marker insertion bit. In FlexE mode, asserting this signal causes the PCS to allow gaps for the alignment markers in place of the data presented on the TX PCS data signal. The application marks the block as an alignment marker and the scrambler does not process the data. In OTN mode, this signal is not used. The input stream is expected to include its alignment markers. |