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Altera_Forum
Honored Contributor I
1,001 Views

The pin VCCPGM power supply at AS mode

Hi all, 

The pin VCCPGM power supply must be 3.0v/3.3v at AS mode in the cyclone v datasheet. why? 

I select a 1.8v low voltage flash from cypress. Can I connet VCCPGM pin to 1.8v? 

 

 

Thanks 

Jimmy
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4 Replies
Altera_Forum
Honored Contributor I
43 Views

as mode is for epcq or epcs shipped by altera. no cypress device. you may miss understand ps or fpp configuration, 2.5 and 1.8v are also available for these configuration mode.

Altera_Forum
Honored Contributor I
43 Views

 

--- Quote Start ---  

as mode is for epcq or epcs shipped by altera. no cypress device. you may miss understand ps or fpp configuration, 2.5 and 1.8v are also available for these configuration mode. 

--- Quote End ---  

 

 

I replace the epcs with a cypress small outline 3.3v spi flash successfully. 

In order to reduce power cosumption, I plan to use the 1.8v spi flash from cypress now. Can i do it?
Altera_Forum
Honored Contributor I
43 Views

I think no. EPCQ-L device runs on 1.8V VCC, but CycloneV doesn't support EPCQ-L, only EPCQ device. If it runs 1.8V VCCPGM, CycloneV will support EPCQ-L devices. So I don't think 1.8V cypress flash work instead of EPCS.

Altera_Forum
Honored Contributor I
43 Views

 

--- Quote Start ---  

I think no. EPCQ-L device runs on 1.8V VCC, but CycloneV doesn't support EPCQ-L, only EPCQ device. If it runs 1.8V VCCPGM, CycloneV will support EPCQ-L devices. So I don't think 1.8V cypress flash work instead of EPCS. 

--- Quote End ---  

 

 

I use the 1.8v spi flash from cypress at as mode successfully, and it runs 1.8V VCCPGM. 

But I still worry about the reliability. 

How can i get the further help.
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