Which chip for OTA flash?

[shabba]

Hi,
Anyone recommend some flash for both 3 and 5v mix of mini, nanos and a few megas? Not sure whether I need spi or i2c either.

Thanks!

(edited title so as not to confuse people)

[mfalkvidd]

@shabba the forum post linked from https://www.mysensors.org/about/ota has a good discussion on flash options

[shabba]

Thanks @mfalkvidd !

[shabba]

I am going to try out http://ie.farnell.com/stmicroelectronics/m95128-wmn6p/serial-eeprom-128kbit-10mhz-soic/dp/9755870

Will report back.

[tbowmo]

@shabba

This will not work with ota

1. it's an eeprom, not a flash (different command set)
2. it only contains 16k byte (128kbits /8 bits per byte)

[shabba]

@tbowmo yes - well spotted. Would be nice to have a clear recommendation that all can use and know to work.

[mfalkvidd]

@shabba could you elaborate on why you can't use the recommendation from https://www.mysensors.org/about/ota ?

[shabba]

if you mean the AT25DF512C-SSHN-B then it is hard to find (in small quantities - I do see http://www.ebay.ie/itm/10x-AT25DF512C-XMHNB-Memory-Serial-Flash-Dual-Output-Read-SPI-104MHz-/201805447862?hash=item2efc8ac2b6:g:ks4AAOSw9GhYlJCY) and also not 5v friendly. I know I can drop voltage but I want to minimise components.

[tbowmo]

@shabba

As far as I can see (from search on mouser) there is no spi flashes available, which is capable at operating at 5V..

The closest is AT25XV021 / AT25XV041, which have an absolute maximum VCC of 4.4V

http://www.mouser.dk/Semiconductors/Memory/Flash-Memory/_/N-488w1?P=1z0y176Z1yzmm0hZ1yzmm18