Breaking News
Comments
Newest First | Oldest First | Threaded View
edastech
User Rank
Author
Root cause of this comparison
edastech   6/4/2014 1:03:04 AM
NO RATINGS
What max has explained is very correct but if you Go to the root cause for this kind
of comparison Xilinx gives gate count information for thr  FPGA 
devices while selecting the capacity of logic for the same and here
starts the confusion when comparing with other vendors like Altera

Max The Magnificent
User Rank
Author
re: FPGAs: System gates or logic cells/elements?
Max The Magnificent   9/30/2011 3:06:51 PM
NO RATINGS
There are two totally different things here -- the number of LCs/LEs reflects the amount of logical functionality you can implement -- the process node impacts how fast the device will function (and how much power it will consume).

Willson
User Rank
Author
re: FPGAs: System gates or logic cells/elements?
Willson   9/30/2011 12:37:53 AM
NO RATINGS
So you mean that I just have to concern about the number of LEs/LCs, but what if those FPGAs were made with different manufacturing processing, for example, Xilinx Spartan-3 series are made with 90nm processing, and Altera Cyclone series are made with 130nm processing, how do I compare these devices?

SZA
User Rank
Author
re: FPGAs: System gates or logic cells/elements?
SZA   3/25/2011 3:49:00 PM
NO RATINGS
PS: Max I reached this article from your Design starts article (http://www.eetimes.com/design/programmable-logic/4214302/What-s-the-number-of-ASIC-versus-FPGA-design-starts-). I noticed you have bug in the cross URL in this article to that above. it crashes due to doubled ref (http://www.eetimes.com/electronics-blogs/other/4210768/%20http://www.eetimes.com/design/programmable-logic/4214302/What-s-the-number-of-ASIC-versus-FPGA-design-starts-)

SZA
User Rank
Author
re: FPGAs: System gates or logic cells/elements?
SZA   3/25/2011 3:42:15 PM
NO RATINGS
It is indeed head spinning, I made my PhD on FPGA architectures and always wondered about this strange comparison mystery and used to crush my head when people asked this question :). It is scientifically insane to compare like that!, particularly with heterogeneity (hard blocks), as you mentioned also. The near best thing one can really do is take design and dump it on ISE/Quartus...(often doable with no high effort). One will get rough idea which device of that vendor will/if/may best serve needs.

DrFPGA
User Rank
Author
re: FPGAs: System gates or logic cells/elements?
DrFPGA   11/22/2010 5:25:06 AM
NO RATINGS
Soon it will be the ASIC guys who start using LUTs instead of ASIC gates as they try and hang on to their shrinking market in a last ditvh effort to capture some of the bigger FPGA market. Won't that be funny...

Jan.Gray
User Rank
Author
re: FPGAs: System gates or logic cells/elements?
Jan.Gray   11/16/2010 6:14:04 PM
NO RATINGS
I agree. Sometimes #LUTs is not the critical resource. Perhaps your design is BRAM or DSP block limited. I recommend vendors quote an FPGA device capability vector e.g. (#LUTs, #BRAM, #DSP, etc.) and/or something more descriptive (#k-LUTs, k, LUT delay, #LUT-RAM, LUT-RAM size/#ports, #BRAM, BRAM size/#ports, #DSP, DSP-size, etc.). See also my old article on this topic, http://www.fpgacpu.org/#021129.

Max The Magnificent
User Rank
Author
re: FPGAs: System gates or logic cells/elements?
Max The Magnificent   11/16/2010 5:44:00 PM
NO RATINGS
This topic makes my head spin -- did I miss anything?



Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Radio
NEXT UPCOMING BROADCAST

What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Are the design challenges the same as with embedded systems, but with a little developer- and IT-skills added in? What do engineers need to know? Rick Merritt talks with two experts about the tools and best options for designing IoT devices in 2016. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.
Like Us on Facebook
Special Video Section
The quality and reliability of Mill-Max's two-piece ...
01:34
The quality and reliability of Mill-Max's two-piece ...
LED lighting is an important feature in today’s and future ...
05:27
The LT8602 has two high voltage buck regulators with an ...
05:18
Silego Technology’s highly versatile Mixed-signal GreenPAK ...
The quality and reliability of Mill-Max's two-piece ...
01:34
Why the multicopter? It has every thing in it. 58 of ...
Security is important in all parts of the IoT chain, ...
Infineon explains their philosophy and why the multicopter ...
The LTC4282 Hot SwapTM controller allows a board to be ...
This video highlights the Zynq® UltraScale+™ MPSoC, and sho...
Homeowners may soon be able to store the energy generated ...
The LTC®6363 is a low power, low noise, fully differential ...
See the Virtex® UltraScale+™ FPGA with 32.75G backplane ...
Vincent Ching, applications engineer at Avago Technologies, ...
The LT®6375 is a unity-gain difference amplifier which ...
The LTC®4015 is a complete synchronous buck controller/ ...
10:35
The LTC®2983 measures a wide variety of temperature sensors ...
The LTC®3886 is a dual PolyPhase DC/DC synchronous ...
The LTC®2348-18 is an 18-bit, low noise 8-channel ...