NRF52840 USB MSC

[bryanhsieh]

Hi Everyone,

I am developing a device that needs to record data from ADC onto a onboard NAND memory. Following the USB MSC example for NRF52840, it seems like the device is emulating as the flash drive with the onboard macronix external memory. However the example only seems to work for NOR devices as shown by this post.

devzone.nordicsemi.com/.../

So my questions are as follows;

1. There seems to be an internal flash translation layer for NOR devices, if I want to use FTFS with NAND devices do I need to write my on FTL or does nordic/keil have a dedicated FTL for NAND devices also.

2)In the USB MSC example, QSPI is used, if I use SPIM to talk the the NAND device can I still emulate it as a USB mass storage provided that I first put FTFS on it?

Thanks for the help

[ovrebekk]

Hi

Thanks for the link, I was able to download the datasheet.

Having a quick look at the specification I got the impression the device is using an 8-bit parallel interface that will not be compatible with the 4-bit QSPI that we support. Unless there is an alternative mode that I didn't find?

I will show the specification to the experts and see if they have some input.

Best regards