Programmable Devices
CPLDs, FPGAs, SoC FPGAs, Configuration, and Transceivers
21325 Discussions

How much transistor are 1 ALM in Cyclone V?

Altera_Forum
Honored Contributor II
3,154 Views

How much transistor are 1 ALM in Cyclone V? (also approximately)

0 Kudos
4 Replies
Altera_Forum
Honored Contributor II
1,418 Views

Hi flz47655, 

 

I don't think Altera release such information anymore. It seems like now is based on how much LE are used and how much LE are in a device.
0 Kudos
Altera_Forum
Honored Contributor II
1,418 Views

Yes, agree with ah_zhi02 comments. I don't think Altera will release such information. You can only know how many LE and ALM from Cyclone V device overview. 

The ALM uses an 8-input LUT with 4 dedicated registers to help improve timing closure in register-rich designs and achieve an even higher design packing capability than previous generations.
0 Kudos
Altera_Forum
Honored Contributor II
1,418 Views

Thank you all, 

What is latest information about LE->transistor conversion?
0 Kudos
Altera_Forum
Honored Contributor II
1,418 Views

Hi flz47655, 

 

I believe that info would not be helpful as well. As there are no direct conversion of LE -> transistor, even if there is one found when you search online, I do not think you can accurately apply to all the devices.  

 

Furthermore if you are talking about LE count, it is actually use to estimate how much resource used, when implementing an IP. You may be able to find out how much LE is used up by an IP in their respective user guides. However it is not compared through transistor count. :p 

 

Also you can download the web edition for freeeeeee to try synthesis your design and then check how much LE is required for your design. :) 

 

Out of curiosity, why would you need the transistor count anyway?
0 Kudos
Reply