Using a two separate 6534 cards I'm trying to code-up a simple test for my UUT (memory device). I need to write a pattern into the device and read back the pattern and verify it matches the value written.
I need the simplest method of using two 6534 cards for a memory (UUT) test. I want to write (byte-wide) a pattern (A5,5A) into the UUT, then read it back and verify it matches the value written. Things that change are: Address inputs (increment by 1 for each read/write) with the control signals (card 1) and data values written/read (card 2). If I detect a mis-match, the test stops, I read the location one more time and verify it's really incorrect, the correct value is written back into the same location just read, a counter is incremented to keep track of the tota
l errors detected and the test (memory read/verify) is resumed. Each time through the memory another counter is incremented to track the number of passes through the memory read test. The test should terminate when the operator hits the VI panel STOP TEST button.
Dave
Check out chapter two of the 653x User Manual for information on the different modes of operation. There it explains the difference between strobed and unstrobed I/O as well as Pattern I/O and Handshaking. It sounds as though unstrobed should work unless your UUT requires hardware timing or handshaking. You will have to keep track of errors in software however since the 6534 does not have any counters on it.
Brian
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