Dataman Forum

I have a 48XP (recent upgrade from LV).

I just tried programming and testing a GAL16V8D and it seems as though the test vectors don't work. I have manually created a couple vectors to 'verify' against the device and they pass. Now the weird part is when I modify one of the vectors to pretent some active low output pin is asserted (when it is not) it STILL PASSES! Any thoughts??

TonyK

Tony,

Test vectors are normally generated by the GAL compiler tool to test the function of the GAL after programming and after the chip has been protected. If the chip fails in the function test it means the JEDEC may not work as you would expect. Which means the design of the PLD may not fit the target. It has nothing to do with the programmer. the programmer just out puts the vector in the map and accepts the input and tells you if there is an error with the output compared to the expected output.

Neil