SERVO CONTROL METHOD OF AN OPTICAL DISK DRIVE WHICH CAN PERFORM A NORMAL SERVO CONTROL OPERATION WITHOUT THE REBOOTING OF THE OPTICAL DISK DRIVE EVEN IN THE LOSS OF AN SDRAM

摘要

PURPOSE: A servo control apparatus and method of an optical disk drive are provided to automatically copy flash ROM data to an SDRAM again even in the loss of SDRAM data. ;CONSTITUTION: If an error generates for tray open and close operations, an MICOM(Microcomputer) compares flash ROM(Read Only Memory) data and SDRAM(Synchronous Dynamic Random Access Memory) data(S13,S14). In case the data do not accord, the MICOM again duplicates the flash ROM data to an SDRAM(S15,S16). If the tray open and close operation normally operates, the MICOM controls spindle servo, sled servo, and focus and tracking servo operations with the SDRAM data(S17).;COPYRIGHT KIPO 2011