Patent ID: 7913150
Filing Date: 2011-03-22
Classification: H03M

Abstract:
1. An apparatus for detecting errors in data transmitted over a communications link having at least a first mode of operation and a second mode of operation comprising: a select circuit configured to select, and provide as a selected code, one of a first digital code and a second digital code, the selection being based, at least in part, on a selected mode of operation, the first digital code being based, at least in part, on a first logical operation of at least a first plurality of data bits of a data stream corresponding to a plurality of communications paths, the first logical operation being consistent with the first mode of operation, the second digital code being based, at least in part, on a second logical operation of at least a second plurality of data bits of the data stream, the second logical operation being consistent with the second mode of operation; and a circuit configured to generate a next value of an error detection code, based, at least in part, on a third digital code and the selected code, wherein the third digital code is based, at least in part, on a third logical operation of at least a plurality of bits of a current value of the error detection code and the third logical operation is consistent with the first and second modes of operation.