EPCS16 equivalent that works at 2.5V?

Micron part, compatible, 2.5V operation.

Product page: m25px16-vmn6p (http://www.micron.com/parts/nor-flash/serial-nor-flash/m25px16-vmn6p)

Regards,

Alex

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Micron part, compatible, 2.5V operation.

Product page: m25px16-vmn6p (http://www.micron.com/parts/nor-flash/serial-nor-flash/m25px16-vmn6p)

Regards,

Alex

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Fantastic, just what I was looking for, I'll order a few for testing.

Thanks Alex.

Alex,

I've just realised this device doesn't support the RES (Read Eelectronic Signature) command that the EPCSX's do.

Does this cause any problems when programming? (I think there's a checkbox somewhere to ignore this now, isn't there?)

Thanks for any feedback,

Nial.

I've used this part many times without any problems. The FPGA programmer within Quartus will just use it and won't concern itself with the device ID.

However, the FLASH programmer, within Eclipse, that you may use for programming FLASH devices from niosII may have an issue with it. If so, you will need to add an entry to the 'nios2-flash-override.txt' file which is located in the {quartus-install-directory}\nios2eds\bin. If you don't have one you'll have to create one.

The following post discusses this at length.

http://www.alteraforum.com/forum/showthread.php?t=20576 (http://www.alteraforum.com/forum/showthread.php?t=20576)

Regards,

Alex

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I've used this part many times without any problems.

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I've got some EP25PX16's and am trying to program via JIC.

When creating the JIC In Convert Programming Files -> Advanced I've enabled the "Disable EPCS ID Check" tick box but when I

try to program the device it's failing with...

Error (209025): Can't recognize silicon ID for device 1

Error (209012): Operation failed

Any ideas?

Thanks,

Nial.

Is 'device 1' not the FPGA itself? How early through the programming cycle does the programmer report this? Can I presume you can still configure the FPGA using a .sof via JTAG - without trying to program the FLASH?

I've never had to disable the EPCS ID check before.

Do you, by chance, have direct programming access to the EPCS or only via the FPGA?

Regards,

Alex

Nial,

Good news (a little bad) and more good.

Good news - I don't have a unit with the Micron part fitted to hand. So, I bought some (M25PX16-VMN6P), fitted them to a board and reproduced the error you reported.

Bad news - the programmer in Quartus is not going to program the Micron part via .jic (not as is, out of the box - see my question below). As the error suggests, it seems the programmer doesn't like the FLASH's device ID that device 1 (the FPGA) is reporting.

All the designs I've used this part on in the past contained a Nios. As a result, for initial board bring up and subsequent bench work, I will have used the FLASH programmer within Eclipse and used a Nios core to program the serial FLASH.

Good news - the work around. Having fitted a Micron part to a convenient board (Cyclone IV based) I have just been through this sequence again - successfully. The board in front of me is booting an FPGA image (that does NOT contain a Nios core) from the newly fitted Micron FLASH.

Sequence in brief:

a) Program the FPGA, via JTAG, with the Nios core with an EPCS interface and JTAG debugger.

b) Using the FLASH programmer within Eclpise, program the .sof (from the project you want on the board) into the serial FLASH.

c) Power cycle the unit. It should now boot as required.

I'm hoping you have a little Nios experience and this all makes sense. If not, let me know and I can help further.

for anyone else reading - is there a way of specifying valid serial flash device id's for the quartus programmer, in a similar way in which you can for the niosii flash programmer (using the 'nios2-flash-override.txt' file)?

Regards,

Alex

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Nial,

I'm hoping you have a little Nios experience and this all makes sense. If not, let me know and I can help further.

for anyone else reading - is there a way of specifying valid serial flash device id's for the quartus programmer, in a similar way in which you can for the niosii flash programmer (using the 'nios2-flash-override.txt' file)?

Regards,

Alex

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Alex, thanks for your further input, sorry for my slow reply but I've been looking at other things.

First off it's good you're seeing what I am, I won't waste any time looking at layout etc.

I haven't looked at Nios for a few years so am pretty rusty, I would much prefer to have a programmer workaround. I'll ask a tame FAE I

know if he can look into this.

WHY do altera insist in devices with the same ID as the EPCS? You'd think they'd be trying to make it as easy as possible!

Nial.

> Do you, by chance, have direct programming access to the EPCS or only via the FPGA?

It's just via the FPGA for simplicity of routing/ reduction in any possible noise pickup and because this has always worked!

Nial.