METHOD AND APPARATUS FOR CONFIGURING A CYCLIC REDUNDANCY CHECK (CRC) GENERATION CIRCUIT TO PERFORM CRC ON A DATA STREAM

摘要

A method and apparatus for configuring a cyclic redundancy check (CRC) generation circuit to perform CRC on a data stream are disclosed. The method includes storing a generator polynomial associated with a CRC equation in a register, where the generator polynomial has a length capable of varying such that the length has any value less than or equal to a number of bits associated with a CRC generation circuit. A bit position of the CRC generation circuit that corresponds to the length of the generator polynomial is selected by using a first multiplexer to generate a feedback value. The CRC generation circuit is programmed to calculate a CRC checksum based on the generator polynomial stored in the register and the feedback value from the selected bit position.