METHOD AND APPARATUS FOR CRC ENCODING INTERFACE OF APB IN MODULATOR

A method and an apparatus for CRC(Cyclic Redundancy Code) encoding interface of APB(Advance Peripheral Bus) in a modulator are provided to reduce the bus share rate by 83% maximally by changing the structure of CRC encoder to a pipeline structure to obtain the maximum payload transmission size. A method for CRC encoding interface of an APB(310) in a modulator includes the steps of: transmitting PWDATA to the APB(310); sequentially inputting the PWDATA(Parallel Write DATA) in LFSRs divided by bits the PWDATA during one PCLK(Peripheral Clock Cycle) period, and storing the input values in the register for generating CRC; storing the LFSR values by a pipeline register inserted by the predetermined number of LFSRs if the clock value of a PCLK(330) rises, and inputting a new PWDATA in the first LFSR(Linear Feedback Shift Resistor); inputting the next data after the stored LFSR value in the LFSR after the pipe line at the next clock of the PCLK(330); attaching the CRC at the input value stored in the register for generating the CRC if the input of the last PWDATA is finished, and performing CRC encoding.