3.3.1. RS-FEC Modes
|Supported RS-FEC Modes||RS-FEC Receives Data From||Example Applications||Details|
25GbE - NRZ w/FEC (528, 514)
You can configure all six FEC blocks per E-tile in this mode.
NRZ mode: Four lanes within a FEC block operate independently for single lane protocols. However, RS-FEC needs to be shared among the NRZ channels within one IP instantiation.
CPRI 24G - NRZ w/ FEC (528, 514)
32GFC w/ FEC (528, 514)
100GbE (4 x 25G) – NRZ w/ FEC (528, 514)
100GbE (2 x 50G) – PAM4 w/ FEC (544, 514)
You can configure a maximum of four out of six FEC blocks per E-tile in this mode. Refer to E-Tile Floor Plan Configurations for more details.Four lanes of a FEC block are used together for multi-lane protocols, like 100GbE.
|PMA Direct||128 GFC|
10GbE – NRZ
25GbE - NRZ w/o FEC
100GbE (4 x 25G) – NRZ w/o FEC
|Protocols or applications that do not need RS-FEC|
You can configure RS-FEC blocks in many possible combinations depending on your application requirements.
|Channels||FEC Block Mode||FEC Receives Data From|
|0 to 3||Aggregate||EHIP_CORE|
|4 to 5||Bypass||N/A|
|6 to 7||Bypass||EHIP_LANE|
|8 to 9||Fractured||EHIP_LANE|
|10 to 11||Fractured||FPGA core|
Refer to the E-Tile Channel Placement Tool for details about possible channel placement based on system requirements.
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