Memory check system and memory check method, memory check method of signal processing apparatus and signal processing equipment, as well as, memory check program

摘要

PPROBLEM TO BE SOLVED: To precisely check a program or coefficient data on a RAM at high speed. PSOLUTION: A program 22 stored in a block having a prescribed size checks a DSP program 23 for every block, compares an operation result 41 with a corresponding parity code 40, and sets a fixed value 44, when the both are matched, or the operation result 41, when the both are not matched, to a register 46. The program 22 on the RAM 20 is similarly checked in the block unit, and sets a fixed value 34, when an operation result 31 is matched to a corresponding parity code 30, or the operation result 31, when the both are not matched, to a register 36. A host determines the validity of the parity code 21 and the programs 22 and 23 on the RAM 20 based on the values of the registers 36 and 46. The host supplies right data to a DSP 2 based on the determination result to correct the content of the RAM 20. The program 22 and the program 23 are alternately checked for each block, and the validity is regularly kept. PCOPYRIGHT: (C)2004,JPO