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Altera_Forum's avatar
Altera_Forum
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12 years ago

EPCS16 equivalent that works at 2.5V?

As a follow up to this thread....

http://www.alteraforum.com/forum/showthread.php?t=34049

...this board is having a re-spin and I'd _really_ like to use a cheap eprom that works at 2.5V, that has been proven.

Does anyone have any recommendations?

I've only started searching so will come back with anything I find.

Thanks for any pointers,

Nial

18 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    --- Quote Start ---

    Altera probably want to sell you their expensive chips, rather than you using off the shelf cheaper parts.

    --- Quote End ---

    I'm not sure, it was an Altera FAE who told me the EPCS parts were ST parts re-branded!

    This machine only has QII 11.0 installed. I've had a look in the bin directory, there's a pgm_parts.txt file with

    entries for the EPCS16 but the values associated with it don't look like part IDs etc.

    Nial.
  • Altera_Forum's avatar
    Altera_Forum
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    Unfortunately, 'pgm_prts.txt' doesn't do what we want. This simply specifies a some basic parameters and licensing related to the parts your particular installations can work with.

    Cheers,

    Alex

    PS. And yes, EPCS parts are simply re-badged serial FLASH parts. I think Altera has deals with ST and others...
  • Altera_Forum's avatar
    Altera_Forum
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    --- Quote Start ---

    I'm not sure, it was an Altera FAE who told me the EPCS parts were ST parts re-branded!

    --- Quote End ---

    That's true, but the EPCS16 equivalent is M25P16, not M25PX16. The latter has beside 2.5V capability a different organization and other features.

    The annoying point is that Altera is promoting 2.5V I/O voltage since years but didn't yet manage to provide 2.5V compatible serial flash devices in the lower MBit ranges.
  • Altera_Forum's avatar
    Altera_Forum
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    --- Quote Start ---

    That's true, but the EPCS16 equivalent is M25P16, not M25PX16. The latter has beside 2.5V capability a different organization and other features.

    The annoying point is that Altera is promoting 2.5V I/O voltage since years but didn't yet manage to provide 2.5V compatible serial flash devices in the lower MBit ranges.

    --- Quote End ---

    So as far as you are aware there currently isn't a 2.5V EPCS16 equivalent? I can stick with my separate voltage regulator (it's only ~$0.40) but it would have been nice to have just the config prom.

    ALTERA, get your collective fingers out and implement a work round.

    Thanks all for your input.

    Nial.
  • Altera_Forum's avatar
    Altera_Forum
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    The obvious workaround would be to support M25PX16 by Quartus programmer.

  • Altera_Forum's avatar
    Altera_Forum
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    --- Quote Start ---

    The obvious workaround would be to support M25PX16 by Quartus programmer.

    --- Quote End ---

    Exactly!

    Is it worth a few of us raising simultaneous service requests?

    I'll do one now....

    SR 11029669

    Can anyone else interested please also submit a request so they get the message?

    Nial.
  • Altera_Forum's avatar
    Altera_Forum
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    --- Quote Start ---

    Exactly!

    Is it worth a few of us raising simultaneous service requests?

    I'll do one now....

    SR 11029669

    Can anyone else interested please also submit a request so they get the message?

    Nial.

    --- Quote End ---

    I'm afraid the output of this SR is that they've confirmed they will not support the M25PX16 .

    So it doesn't look like there is a 2.5V EPCS16 equivalent that we can use.

    I wonder what Xilinx have?

    Nial