SDIO interface on nRF9160

[Rklan]

Hello,

 

We are focussing on the nRF9160 to build a IOT datalogger.

We would like to intergrate an micro SD card.

Now, I mis the 4-bit SPI interface ( SDIO), and I asked already if this is present or not ( answer was not present)

 

But now, I’m analyzing the schematics of the nRF9160 Devboard, and there is an micro SD card implemented ( not mounted), and I see 4 bits ( data0..data3) used.

They go to P0.21.. P0.24

It’s on page 7 of the schematics, lower right corner “Nordic internal debugging interface”

 

IS there a trick to utilize the 4 bits wide bus to read/write to an SD card?

OR can I only implement the legacy 1 bit SPI mode?

[Hakon]

Hey,

you need to use regular SPI, not QSPI, if you want to read an SD card on the nRF9160.