Implementing known scrambling relationship among multiple serial links

摘要

A method and circuit for implementing known scrambling relationship among multiple serial links, and a design structure on which the subject circuit resides are provided. A transmit Linear Feedback Shift Register (LFSR) is provided with each of the multiple serial links for scrambling transmitted data. A receive Linear Feedback Shift Register (LFSR) is provided with each of the multiple serial links for descrambling received data. Each of the transmit LFSRs is initialized to a unique value. Each transmit LFSR conveys a current unique value to a receive LFSR for synchronizing the transmit LFSR and receive LFSR to begin scrambling and descrambling data.

主权项

1. A method for implementing known scrambling relationship among multiple serial links comprising:
providing a transmit Linear Feedback Shift Register (LFSR) with each of the multiple serial links for scrambling transmitted data; providing a receive Linear Feedback Shift Register (LFSR) with each of the multiple serial links for descrambling transmitted data; initializing each said transmit LFSR with a respective unique value per link instance during power-on of the multiple serial links, each said transmit LFSR starts running responsive to said respective initialized unique value per link instance, and continues running during life of the power-on; each said respective initialized unique value per link instance being different from one another and substantially without adding of EMI radiation of each link; and performing a link training sequence to initialize each of the multiple serial links, said link training sequence including each said transmit LFSR, conveying said current unique value per link instance to a receive LFSR, for synchronizing said transmit LFSR and said receive LFSR to begin scrambling data; each said respective current unique value per link instance being different from one another for each said transmit LFSR.