Re-work hints for QSPI flash on PCA10056

[Julie H]

The design I'm working on will tentatively use "Original SPI" (like "Original Coke" ...), so I started cutting up the QSPI bridges to disconnect DIO2 and DIO3 (which are also other things ...) prior to pulling them up to Vcc.

Has anyone else done this? I'm comfy working under a microscope, but I'm an old geezer fart and I'm always looking for huge pads and buttons and knobs and dials I can use.

[ovrebekk]

Hi Julie

There are several standard SPI interfaces in the nRF51840, both master and slave, so you shouldn't need to repurpose the QSPI interface for this.

If you just need standard SPI I would simply use the SPIM0 or SPIM1 interface instead ;)

Best regards
Torbjørn

[Julie H]

Yup! Little known fact about SD cards. I don't know if there are any embedded SD card devices, but MMC also works with SPI and there are eMMC devices. The nRF52840 will be a great device for feature-full designs that require bulk storage.

And by way of status, I have managed to port the Winbond SPI code I had on an nRF52832 onto the nRF52840 and it works like a charm.

[shilpa]

Hi,I would like to know whether any libraries available for eMMC integration in nrf52832. Heard that it is not compatible with spi interface in nrf52832..

[ovrebekk]

Hi

For the future I would recommend opening a new ticket for questions like these, rather than adding them on to an old thread. 

Are you interested in any particular eMMC devices?
The person with most knowledge on this in the company is currently out of office, but as soon as he is available I will ask for the details. 

Best regards
Torbjørn