Hello, how can i implement a memtest in my philips P89C51 for data, idata and xdata. Thanx
"my design requires a built-in-test. the memtest must find approx. 90% of memory failures" Fill the memory with a pseudo-random pattern and read it back. If your hardware design is proven, though, I'd say you're probably wasting your time.
in the olden days, when computers were steam driven and the king of diamonds were still a jack, memory failures did occur quite frequently. Today, after silicon was found useful, I do not recall a memory failure. With more than 50.000 uCs running out there, I recall no repair due to memory failures. So, if you do not have anything better to do, by all means, make a memory check. m Otherwise I suggest you get on with some real work :). Erik