Patent ID: 6072827
Filing Date: 2000-06-06
Classification: H04L

Abstract:
An integrated system including automatic baud rate detection from a set of available baud rates, said system comprising:a programmable central processor;a serial communication port coupled to a serial data line which provides data at an actual baud rate; anda trigger input independent of said serial communication port and coupled to said serial data line for indicating signal transitions on said serial data line;said programmable central processor being programmed to establish a current baud rate for said serial communication port, collect a character from said serial communication port at said current baud rate, identify a frame error associated with said character, count the number of signal transitions on said trigger input during presentation of said character, determine the magnitude of said actual baud rate from said count of signal transitions on said trigger input in relation to the number of transitions as indicated by said character and increasing or decreasing said current baud rate of said serial communication port in accordance with a binary search of said set of available baud rates to make said current baud rate equal said actual baud rate.