| 摘要 |
<p>PURPOSE:To detect an existing fault through simple constitution by outputting a report signal showing a signal which shows the generation of an error when a signal showing the generation of a correctable error is produced. CONSTITUTION:A memory part 2 is provided together with an error detection/ correction code generating part 3, an error correction/detection code checking/ correction part 4 and an error signal switching part 5. The memory diagnosis is carried out when the system power supply is applied. In this case, an FF6 is set when a diagnosis mode is set. Then the part 5 performs control so that two error report signals 18 and 19 can be delivered. Then a memory test is carried out. Then a signal 18 showing the generation of a correctable error is outputted from the part 5 when a correctable error is produced. Thus it is possible to recognize the presence of a defective memory.</p> |
