METHOD AND APPARATUS FOR PARITY TEST FOR MEMORY CHIP

摘要

PURPOSE: To correct data or to stop the operation of a parity test device before the data are stored in a wrong memory by performing the parity check of the data and also address to detect an error in the early stage of a memory cycle. CONSTITUTION: The parity check function is carried out in a memory chip 10 by a 12-bit address parity check function circuit 40, a 9-bit data parity check function circuit 42 and a parity logical decoding circuit 44. The parity check function can be selectively carried out to be disabled and also can select the odd/even polarity to ensure the flexibility.