Arria® V Device Handbook: Volume 2: Transceivers

ID 683573
Date 5/29/2020
Document Table of Contents Clock Data Recovery (CDR) Control Block

The CDR control block is used for Rx.L0s fast exit when operating in PIPE/PCIe Gen 3 mode. Upon detecting an Electrical Idle Ordered Set (EIOS), it takes manual control of the CDR by forcing it into a lock to reference mode. When an exit from electrical idle is detected, this block moves the CDR into lock to data mode to achieve fast data lock.