SPI NAND Flash Driver support + nRF52840

[coyodha]

Hi Nordic Team,

I've read some forum discussion about using NAND SPI Flash Chip as external flash storage. These are two chips I'm considering : 

W25N01GVZEIG

 and MT29F2G01ABAGDWB-IT:G

 

Now, I think I can't really afford NOR flash to do QSPI on nRF52840, considering it only supports NOR Flash.

Has there been any development on the NAND SPI flash support/similar examples up till now?

[coyodha]

Just to add on with this question, if I am to go with microSD card solution for external flash storage, I understand that the SD card will consume more current but by how much (say if I log every minute)? is there any other implication?

[ovrebekk]

Hi

We don't have any libraries for accessing NAND devices, no. One of the problems with NAND devices is that they are less reliable than NOR devices, and if you interface a NAND device directly you need to apply error correction code to look for bit errors in the data. 
When connecting to an SD/MMC card the driver chip on the card takes care of this for you, so that you can more easily interface with the card. 

We haven't done any testing to verify how much current draw SD cards will add. This will be different from card to card, so you really need to do some measurements on the card you want to use (or see if the manufacturer publishes some test data). 

If you have one of the Power Profiler Kits it is quite straight forward to measure dynamic system current, unless you already have a proper lab power analyzer to do this. 

Best regards
Torbjørn