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Altera_Forum's avatar
Altera_Forum
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15 years ago

Problems with VHDL lookup table

Hi, I'm trying to debug a Cyclone design which writes values taken from a lookup table to the address inputs of a crosspoint analog switch. The problem is that everything looks OK in the Quartus s...
Altera_Forum's avatar
Altera_Forum
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15 years ago

OK, all resolved now.

The LUT was behaving as designed all along - but the analog switch IC has non-sequential mapping of AX addresses to analog channels! This info got lost between myself and the guy testing the hardware.

[Must read the datasheets a bit more thoroughly next time]

Thanks to all who replied.