Signetics PLS173 PLA fuse numbering?
aek at bitsavers.org
Thu Sep 22 19:30:50 CDT 2016
there is a better diagram on page 70 of
under dataIO which gives the fuse number
On 9/22/16 4:23 PM, Glen Slick wrote:
> A Signetics PLS173 PLA has a total of 2178 programmable fuses:
> (32 AND gates for logic terms plus 10 AND gates for control terms)
> (24 true/complement inputs plus 20 true/complement inputs/outputs)
> = 1848 fuses
> (10 OR gates)
> (32 AND gates logic term outputs)
> = 320 fuses
> 10 fuses for true/complement output selection
> For reference see the PLS173 FPLA Logic Diagram on page 5-70 (page 242
> of the PDF) of the Signetics PLD Data Manual 1987
> The question is for anyone here that knows: How are these fuses in the
> FPLA Logic Diagram numbered as they would be in a JEDEC fuse map file
> used to program a device, or when read back from a device? I can't
> find that information anywhere.
> If I read a PLS173 device into a JEDEC fuse map it should be trivial
> to generate the logic equations by hand if the fuse numbering is
> known, which is what I want to do.
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