| 摘要 |
PURPOSE:To form a memory check device with a reduced memory capacity by comparing and adjudicating two output data, that is, an output of an expected value data memory reading expected value data in accordance with addresses and an output of a memory to be checked. CONSTITUTION:The addresses produced by an address generator 4 are converted by an address converter 52 as a function of the location of the memory cell in a data memory 71 storing 'a portion in which real memory portions with existence of the actual memory cell are re-arranged' and 'a portion in which only memory cell void portions are compressed and re-arranged' of a ROM6 to be checked. Hence, output data applied to and read from the ROM6 to be checked is applied to one data comparator 8 while the data read from the ROM6 to be checked are applied to the other comparator 8 and the two output data are sequentially compared to each other to check the ROM6.
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