Functional Description

The 10GBase-KR PCS includes all the functionality of a standard 10GBase-R PCS along with functionality to replicate XGMII data stripes to adapt slower Ethernet data rates to the fixed speed of the SerDes. It also includes functionality for a modified Clause 37 auto-negotiation state machine to pass status information from the PHY to the MAC as defined by the USXGMII standard. (The PCS does not support the packet control header (PCH) non-standard preamble described in the USXGMII standard.)

The 10GBase-KR PCS complies with the Cisco Universal SXGMII Interface and IEEE Std. 802.3 Clause 49. Additionally, it supports Base-R FEC (as per IEEE Std. 802.3 Clause 74). You can configure the management and configuration through an APB interface. The SerDes connection is a 32-bit interface.