Visible to Intel only — GUID: rpe1616440351155
Ixiasoft
Visible to Intel only — GUID: rpe1616440351155
Ixiasoft
3.1.2. FEC Direct Supported Modes
- IEEE 802.3 RS(528, 514) (CL 91, KR)
- IEEE 802.3 RS(544,514) (CL 91, KP)
- Ethernet Technology Consortium LL RS(272, 258)
- Supports 25-400G KP/KR/LL FEC
- Supports only the System PLL clocking mode
- Supports only the Duplex operation mode
- Supports the gearbox feature
You can enable FEC Direct mode in the IP parameter editor by turning on the Enable RS-FEC option, as RS-FEC (Reed Solomon Forward Error Correction) Options describes. FEC direct modes (KP,KR,LL) with FEC specifications are topology-dependent to achieve different BER. FEC data to and from the PCS is 33b. On the PMA interface side, FEC data from and to the PMA interface is 40b wide.
Enabling Gearbox in RS-FEC Mode
For designs that include FEC, gearbox enables automatically. The gearbox options are 32:40, 64:80, and 128:160. Firecode FEC supports the 32:33 gearbox ratio. For designs that include a PCS (Physical Coding Sublayer) only, the only option is the 32:33 gearbox ratio.
Mod Type | PMA Type | FEC Mode | Clock Mode | Width | PMA Width | PMA Interface FIFO (Tx/Rx) |
F-tile Interface FIFO (Tx/Rx) |
Core Interface FIFO (Tx/Rx) |
---|---|---|---|---|---|---|---|---|
NRZ | FGT | RS(528, 514), RS(272,258), RS(544, 514) |
Sys PLL | DW | 32 | Elastic/ Elastic |
Phase Compensation/ Phase Compensation |
Phase Compensation/ Phase Compensation |
FHT | RS(528, 514), RS(272,258), RS(544, 514) |
Sys PLL | DW | 32,64 | Elastic/ Elastic |
Phase Compensation/ Phase Compensation |
Phase Compensation/ Phase Compensation |
|
PAM4 | FGT | RS(528, 514), RS(272,258), RS(544, 514) |
Sys PLL | DW | 32,64 | Elastic/ Elastic |
Phase Compensation/ Phase Compensation |
Phase Compensation/ Phase Compensation |
FHT | RS(528, 514), RS(272,258), RS(544, 514) |
Sys PLL | DW | 32, 64, 128 | Elastic/ Elastic |
Phase Compensation/ Phase Compensation |
Phase Compensation/ Phase Compensation |