You do not have to use external adcs/dacs.
It is possible to construct sigma-delta adc/dac all within the
cpld/fpga fabric.
xilinx xapp154.pdf is one example (or 153/155 I don't remember exactly).
also there exist so called antifuse CPLDs/FPGAs that REALLY do not
contain any sware,
an
-- Sent from my BlackBerry Wireless thingy while I do
> other things...
>
> -Original Message-
> From: paul swed
> Date: Fri, 5 Feb 2010 09:14:32
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Small CPLD/FPGA for microc
easurement
Subject: Re: [time-nuts] Small CPLD/FPGA for microcontroller replacement
On 2/5/10 6:14 AM, "paul swed" wrote:
On Fri, Feb 5, 2010 at 9:04 AM, Didier Juges wrote:
>
> Part of the requirement is that the devices be immune (as much as
> practical)
> from SEU m
Feb 2010 09:14:32
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Small CPLD/FPGA for microcontroller replacement
Didier that is indeed a tall order.
But at least since the system already exists you have the established
requirements in hand.
So my question is (And
Hi
The Max II is the current Altera CPLD family.
http://www.altera.com/products/devices/cpld/max2/mx2-index.jsp
There are some older families like the MAX3000 still running around at some
level of production. For a new design of the complexity you are looking at,
go with the latest and greatest.
On 2/5/10 6:14 AM, "paul swed" wrote:
On Fri, Feb 5, 2010 at 9:04 AM, Didier Juges wrote:
>
> Part of the requirement is that the devices be immune (as much as
> practical)
> from SEU malfunction. I was told Atmel (or Actel?) makes flash-based small
> FPGAs that may fit the bill. Most SRAM
Didier that is indeed a tall order.
But at least since the system already exists you have the established
requirements in hand.
So my question is (And I am uneducated in DO-254) is a state machine okay?
Because it sounds like thats what you are forced into. If true then its much
more like the tradi
It looks like I will have to get educated on CPLD/FPGAs on short notice.
My application at the moment will be the replacement of small
microcontrollers for military and commercial aviation projects that do not
want/tolerate software/firmware (some customers and government regulations
do not consid
