公开(公告)号：JP2000232439A

公开(公告)日：2000-08-22

申请号：JP36358499

申请日：1999-12-22

Applicant: LUCENT TECHNOLOGIES INC

Inventor： TONY S L-KICK ,  LATURELL DONALD R ,  LANE A SMITH

IPC: H04L7/10 ,  H04B14/04 ,  H04J3/06 ,  H04L12/43

Abstract: PROBLEM TO BE SOLVED: To decrease the number of signal lines of a synchronous serial interface by putting a preamble code word into a data stream to be transmitted and detecting the preamble code word contained in the data stream via a synchronous preamble detection module. SOLUTION: A controller 100 stops intentionally the operation of a clock source 130 for a prescribed time to start the resynchronization and puts a preamble code word into a transmission data stream 116. A clock absence timer 132 of the controller 100 has a self-monitoring function to decide how long the controller 100 has stopped the output operation of the source 130 onto a clock signal line 110. Then a preamble inserting module 134 puts a preamble code word into a time slot after a satisfactory time elapses from a point of time when the clock received from a CODEC 106 is held.