| 摘要 |
<p>PURPOSE:To utilize the part of nondefective memory element and to improve the countermeasure performance to the detects produced after shipment, by providing an element which stores the addresses and data requiring corrections separately from the defective part of the memory element. CONSTITUTION:When a nondefective one of address signals A1-Ai is supplied, an address is selected by an address decoder AD1. Then the data written to a memory matrix MM1 is delivered out of a three-state output buffer OB1. While the block of a ROM II serving as a ROM element for correction inhibits the actuation of the defective area of a ROM I and transmits the normal data. Therefore the part corresponding to the defective area of the ROM I is programmed to the part of an address decoder AD2 of the ROM II as sell as to the part of a memory matrix MM2 respectively.</p> |
