there is a better diagram on page 70 of 981-0251_ProgrammableLogicDiagramPackage_Sep90.pdf 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) > times > (24 true/complement inputs plus 20 true/complement inputs/outputs) > = 1848 fuses > > (10 OR gates) > times > (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 > http://www.bitsavers.org/_dataBooks/1987_Signetics_pldData.pdf > > 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. >