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The pin VCCPGM power supply at AS mode

Altera_Forum
Honored Contributor II
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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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Altera_Forum
Honored Contributor II
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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.

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Altera_Forum
Honored Contributor II
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--- 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?
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Altera_Forum
Honored Contributor II
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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.

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Altera_Forum
Honored Contributor II
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--- 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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