RS-FEC Sub-Modes - 3.1 English

UltraScale+ Devices Integrated 100G Ethernet Subsystem Product Guide (PG203)

Document ID
PG203
Release Date
2022-11-02
Version
3.1 English

There are four sub-modes of RS-FEC decoder operation available in both normal mode and transcode bypass mode. Three of these sub-modes are defined by the IEEE 802.3bj specification, and the fourth is a non-standard mode. Table: RS-FEC Operating Sub-Modes lists the valid RS-FEC operating sub-modes. All control pins are sampled on the first cycle after rx_reset is deasserted.

Table A-3: RS-FEC Operating Sub-Modes

Control Signal

Sub-Mode

1

2

3

4

ctl_rsfec_ieee_error_indication_mode

1

0

1

0

1

0

1

0

ctl_rx_rsfec_enable_indication

1

1

1

1

0

0

0

0

ctl_rx_rsfec_enable_correction

1

1

0

0

0

0

1

1