3-wire Interface on nRF52?

[jcondon]

One of the features missing on the nRF51 was the 3-wire SPI interface standard (Clk, Data, CS). Is this available for the nRF52?

[Anders Strand]

Hi.

The nRF52 will not have built in support for combining the MISO and MOSI line. If you are using a 3-wire device, you can connect MOSI to MISO with a 10k resistor like this guide does.

-Anders

[wdu]

This information is not correct. At least the SPI block supports 3-wire SPI (combined MISO/MOSI), and I suspect the SPIM block also supports it.