| 摘要 |
PURPOSE:To relieve a 1-bit memory error without providing any circuit which inhibits the memory access from other processor specially by employing a partial writing system, and reading 1-bit error data and rewriting corrected data in a single-time memory access. CONSTITUTION:A processor 16 sends a read request to a memory device 1 to which data 3 containing a 1-bit error is read out of a storage part 2 in the process of instruction execution, and sets the corresponding address in a memory address register 4, and the memory device 1 reads the data 3 out of the storage part 2 and inputs it to a humming check circuit 15 to detect the 1-bit error and correct the error bit. The processor 16 is informed of the 1-bit error from the memory device 1 through a signal line 9 in the instruction execution process, so the address of the 1-bit error data 3 is fetched from an error address register 5 through a bus 8 after the instruction execution is completed. |
