CPLDs

[1205vijay]

what are selection criteria for CPLD/FPGA?

I need the list of considerations while choosing a device like power,vol,current,IO's etc.........

Please dont say it depends on the application used. Yes it is but in general how can i select a CPLD/FPGA. 

please help me in this regard.

Thanks in advance.

[bobster_the_lobster]

Money!

bobster

[ayang]

RAM size/quantity, available voltage rails, specialized features (DSP, gigabit transcievers, processor), speed of fabric, IO standards, power, availability of technical support, available IP, company stability (will they still be around during my product lifecycle?)... oh and like Bob said... $$$

[1205vijay]

 Thanks for the support ayang and bob too.

My concern is only in a technical aspect.

Can you suggest any document from xilinx which can give the complete details in selecting an CPLD/FPGA.

if you are saying voltages,current or any other parameters are to be considered  what are that currents, volatages to be strictly followed???? in detailed.

[ayang]

It depends on the application. =\

[olliie]

pesonally I think the way to narrow it down goes like this

user I/O - you need to know how many, and if you need high speed transceivers

application - do you need extended temperatures/military grade parts

DSP - do you have any need for multipliers

Longevity - do you need the same part for 1 year, 10 years or more?

This should narrow it down quite a bit,

Then there is

The size of the design, which will probably be smaller than what you have selected above.

Cost - talk to an FAE if you can as some parts are cheaper because...well just because.

and yes there are some considerations necessary if you want to do something whacky with IO voltages, but most parts support the sort of things you want to do.