| 摘要 |
PURPOSE:To reduce the number of memory bits, by performing address check through the use of humming code, and by performing the program stop with the syndrome signal at error address occurrence. CONSTITUTION:The coded circuit ECD forms humming code from the write-in data and address, performs address check by utilizing the humming code, and generates the syndrome by decoding the humming code from the memory data and address through the decoding circuit DEC. Further, at the occurrence of address error, program stop or compulsive address jump is made with the syndrome signal. Thus, the write-in of parity bit is made unnecessary and the number of memory bit can be reduced. |
