Achronix Speedster22i 10G/40G/100G Ethernet - Manual (Page 9)

UG029, September 6, 2013 9

Each PCS layer implements auto-negotiation, but does not include Parallel
Detection. Parallel Detection must be implemented in user logic when the remote
device does not support auto-negotiation or when auto-negotiation is disabled.

When operating in 10G mode of operation, the 10G MAC can implement a
configurable 10/100/1000 SGMII/1000Base-X PCS layer instead of the normal
XGMII/10GBase-R PCS layer to allow operations below 10Gbps.

Fully configurable Inter-Packet Gap (IPG) supports LAN and WAN with support
for Deficit Idle Count (DIC) to reduce bandwidth loss. Configurable in full-duplex
operation

Optional Frame Check Sequence (FCS) checking (add and delete)

PCS Lane Marker Insertion and deletion..

MAC support for Link Pause Flow Control and Priority Flow Control (PFC)
enables prioritization of up to 8 traffic classes.

PCS layer timestamp support enables IEEE 1588 precision time protocol.