fpga/pal/pld

[Tim Ressel]

Paul,

Wow. Um, lets take it one step at a time. To determine which chip/technology to
use, we need to determine how many gates and registers are in use. Ands, ors,
inverters count as gates. Flip-flops count as one register. An octal bus thing
like an LS573 count as 8 gates. Another important consideration is how many
input/outputs there would need to be.

The technology we're using here is the Xilinx XC9500 stuff. It is nifty in that
you can download the config data to it via a cable from the PC. Here is some
data:

Part:		Registers:	Gates:		I/O pins (PLCC):
XC9536		36		800		34
XC9572		72		1600		34

Another good route is the 22V10. It contains 10 registers and has allot of
flexibility on its I/O pins. 

A good place to get educated about the FPGA/CPLD world is the Xilinx data book.
They also have development boards, but their software is pricey. ABEL is
probably your best choice. I think its being given away at this point.

Tim Ressel--Hardware DQ
Hewlett-Packard
Verifone Division
916-630-2541  
tim_r1 at verifone.com 



> ----------
> From: 	Paul Maddox[SMTP:space_banana at hotmail.com]
> Sent: 	Tuesday, August 17, 1999 8:23 AM
> To: 	synth-diy at mailhost.bpa.nl
> Subject: 	fpga/pal/pld
> 
> Dear all,
> 
>   hi, is there anyone out there who has experience with these programmable 
> logic things? I dont know if I want FPGA/PAL/PLD, I dont even know what the 
> differences are. I have a circuit which uses about 40 74hcxxx chips, and 
> would like it on one.
> 
>   Can anyone offer advice/help?
> 
>   Are there starterkits? (I got one for my AVR)
>   Are there any good books?
> 
>   Paul
> 
> 
> 
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