[Coco] [Color Computer] Re: USB Anyone?

[j_e_daggett]

James

 The Xilinx XCR3032XL-10VQC44C is a 32 macrocell CPLD that is in a 44
VQFP package and commercial temperature grade. It has 10 nS pin to pin
delay and is $1.70 unit price from Xilinx online store. Also can be
Avnet has them for $1.87 unit price.

By the time you scrounge and find a 74LS30, 74LS00s, and 74LS04s, you
are going to have near a buck invested already. Even if y ou went
surface mou nted you are not going to get the circuit in as small a
board as I  have now. 

I have traded component cost for reduce PCB cost. The smaller the
actual  board the cheaper your PCB cost will be. 

james 

--- In ColorComputer at yahoogroups.com, "James Diffendaffer"
<jdiffendaffer at y...> wrote:
> 
> Won't a CPLD make it more expensive?  I had in mind something anyone
> could build without having to buy everything from someone unless they
> want to.
> 
> 
> --- In ColorComputer at yahoogroups.com, "j_e_daggett" <j_e_daggett at y...>
> wrote:
> > 
>  I do not have the room to set up my Coco 3 and test any
> > software. I can finish the VHDL logic to program the CPLD. Compile it
> > and and program the CPLD. The board has provisons to reprogram the
> > CPLD in circuit. 
> > 
> > james





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