3 ms·
It's not programmable in the sense of a ((E)E)PROM; it is "programmed" in the design of the silicon logic, not programmed in the sense of putting it in a socket
by tankenmate 6y ago
It's not programmable in the sense of a ((E)E)PROM; it is "programmed" in the design of the silicon logic, not programmed in the sense of putting it in a socket and (re)programming with the data you want.
PLAs have a few benefits over ROMs in that it can represent a subsection of a logic space and can also handle custom inputs / outputs like "Don't Care" or "High Impedance" / "Z state" / "Disabled" which a ROM can't do.
- dfox 6y agoMain benefit of PLAs over ROM is that for many "useful" logic designs the resulting array is significantly smaller. In fact, ROM is simply an degenerate PLA where the AND array is fixed and only the OR array is programmable.
- tankenmate 6y agoThe smaller size was what I was getting to with the subsection, I should have been more explicit.