Preservation of Correspondence - And Media - MMI PALS's

Glen Slick glen.slick at gmail.com
Sun Feb 11 17:38:46 CST 2007


On 2/11/07, Grant Stockly <grant at stockly.com> wrote:
>
> >Looks like the 16R8 has 8 inputs, 8 D/Q outputs with feedback, 1 clock
> >input, and 1 output enable input.  Looks like there are 32 columns (8x
> >input True/False plus 8x D/Q feedback True/False) and 64 rows (8x
> >product terms into each D/Q output) for a total of 2048 fuses.  So I
> >think that would be 256x8, not 512x8.
>
> 1024 fuses is right.  Talking about "looks", I just happen to have pictures
> of the silicon on a MMI 16R8 HAL.  A HAL is just a manufactured PAL.
>
> http://www.stockly.com/forums/showthread.php?t=18
>

How does that add up to 1024 instead of 2048?  A single block as shown
on the page in the above link has 256 fuses doesn't it?  And there are
8 of those blocks?  So 256 * 8 = 2048 fuses?



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