Patent ID: 6128317
Filing Date: 2000-10-03
Classification: H04J,H04L

Abstract:
A data processing system comprising:a first data line;a first subsystem; anda second subsystem coupled to the first subsystem by the first data line,wherein:data is transmitted from the first subsystem to the second subsystem on the first data line utilizing a first plurality of signals forming a communications protocol,said communications protocol utilizes a frame having an ordered sequence of bits and comprising:a control codeword comprising a first validity bit and a second validity bit,a first data codeword corresponding to a first channel, anda second data codeword corresponding to a second channel,the first data codeword is valid when the first validity bit is in a first state, and the first data codeword is not valid when the first validity bit is in a second state,the second data codeword is valid when the second validity bit is in the first state, and the second data codeword is not valid when the second validity bit is in the second state,the first validity bit and the second validity bit are set or cleared on a frame by frame basis in the first subsystem, anda first frame is transmitted from the first subsystem to the second subsystem on the first data line.