1.2. Design Considerations
- A reconfiguration is only available within a specific topology. Reconfiguration across different topologies is not supported.
- A reconfiguration is dependent on the fracturing rules specified in the F-Tile Architecture and PMA and FEC Direct PHY Intel® FPGA IP User Guide. For instance, you can separate a 200G fracture into two independent 100G fractures, and so on.
- All switching must be done through a neutral state by asserting the digital data path reset and disabling the PMA.
- Any configuration supports the SerDes rate reconfiguration as long as the rate is legal for a given serialization factor and consistent with any used system clock.
- Dynamic reconfiguration for wireless IPs applies to TX and RX data paths in a symmetric manner.
- PMA-direct supports equal PMA widths between TX and RX data paths. However, CPRI supports a PMA-direct width of 20-bit combined with a 32-bit PCS-direct width or 32-bit FEC+PCS-direct width.
- All IPs supporting dynamic reconfiguration must adapt to the F-tile system clock. You cannot dynamically reconfigure the F-tile system PLLs, including reference clock pin and frequency.
The use of Debug Toolkits (NPDME, ETK, and TTK) may prevent successful Dynamic reconfiguration. Intel advises against the use of these Toolkits with protocol IP which is to be dynamically reconfigured.
- An FGT protocol IP which has internal serial loopback enabled via CPI commands must first disable serial loopback before performing a dynamic reconfiguration operation to the next target profile. Failure to disable internal serial loopback prior to a dynamic reconfiguration operation can result in the functional failure of the protocol IP.
- Reconfiguration IDs are defined globally. These need to be unique per design, but not per tile. For example, if your design consists of two separate DR groups located in different tile locations, the reconfiguration ID values assigned to the two DR groups need to be unique. Overlapping of reconfiguration IDs for DR groups located in different tiles is not allowed.
- Mixture of F-Tile FGT and FHT PMAs is not supported for "Exclusive" dynamic reconfiguration groups.
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