ATM CELL TRANSFER DEVICE, ERROR DETECTION CORRECTION METHOD USED THEREFOR, AND PROGRAM OF ATM CELL TRANSFER DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an ATM cell transfer device capable of detecting a read error more precisely, and recovering to a normal state without losing a cell residing in an FIFO memory.;SOLUTION: An SOC fault detector 33 counts the length from a high pulse to the next one for an R_SOC signal read from the FIFO memory 22, monitors the occurrence of a fault, and compares the phase between the R_SOC signal and a reference SOC signal for detecting the shift width of the high pulse. The SOC fault detector 33 notifies the detection of the fault to an SOC corrector 4 and the outside by an SOC fault detection signal, and notifies the detected shift width to the SOC corrector 4 by counter correction information. When the SOC fault detection signal is notified, the SOC corrector 4 outputs a correction mode signal, and separates a CLAV generator 31, a data output control unit 32, and an FIFO read control unit 34 from the outside.;COPYRIGHT: (C)2006,JPO&NCIPI