TX phase alignment can be performed on one channel (single lane) or a group of channels sharing a single TXOUTCLK (multi-lane). See the following table for use modes.
| TX Buffer Bypass | TX Buffer Bypass Modes |
|---|---|
| Single-Lane | Auto |
| Multi-Lane | Auto |
When the TX asynchronous gearbox is used, the exact use mode depends on the TX fabric interface data width and TX internal data width configuration. See the following table for buffer bypass with asynchronous gearbox applied to both single-lane and multi-lane use modes.
| TX Buffer Bypass with Asynchronous Gearbox Use Modes | TX Data Width Configuration | Note |
|---|---|---|
| 1:1 Mode | Fabric Data Width = Internal Data Width | Phase alignment procedure not required. |
| 2:1 Mode | Fabric Data Width = 2 x Internal Data Width | Phase alignment procedure required. |