Memory Expansion of nRF52840 DK

[Yash.P]

Hello DevZone,

It seems that the nRF 52840 DK has 1MB of internal flash memory and it can be extended by external memory via QPSI. I have found External Memory source where it says, "

The nRF52840 DK has a 64 megabit external flash memory. The memory is a multi-I/O memory supporting both Serial Peripheral Interface (SPI) and Quad Serial Peripheral Interface (QSPI).

The memory is connected to the chip using the following General-Purpose Input/Output (GPIO)s:"

So in order to get this 64Mb or 8MB of storage should I need to short any on board pins or do I need to purchase anything externally?

Thanks in advance!

[Turbo J]

The memory chip is connected by default, all you needed to do is to flash one of the examples that use it.

[Tudor B.]

That's not exactly true.

Yash.P's question is pretty vague. Use the external flash for...what?

You can use it as a File System; you can use it as an USB mass storage; you can use it as External XIP; OR you can use it as all three if you make three partitions (one for each of them).

Yash.P Which option are you interested in?

[Yash.P]

Hey Tudor,

Let me explain my situation. I am currently developing and merging multiple examples provided by Nordic Open-source programs. As The nRF52840 DK has a 64 megabit external flash memory. There's a chance in future that the space might runout for me to flash a hex file into it. 

So I want to expand the memory of the? DK. How do you recommend to get it

[Tudor B.]

Based on what I understand, you want External XIP (execute in place). This would make the external storage to be the ROM/ flash for your image. A colleague of mine is working exactly on this. Check out his ticket regarding this topic:
devzone.nordicsemi.com/.../xip-not-working-on-nrf5340-on-3-0-sdk