I want to use the NRF8001 with an ATTINY.

[Huibido]

An arduino board is to much for my project. I only need the interface for the NRF8001 and only 2 or three extra IO pins. Can I use the ATTINY25 and what is teh proper connection between them MISO and MOSI is not a problem, but what about REQN and RDYN? REQN to PA6? RDYN to PA7? Or is an ATTINY25 not a good idea?

Huibido

[Hung Bui]

Hi Huibido,

Actually you would need 6 pins to control the nRF8001: SCK, REQN,RDYN, MOSI, MISO and RESET.

REQN pin acts like CS chip select pin, when the MCU want to enable the nRF8001.

RDYN pin tells when the nRF8001 is ready , after the REQN is active.

So you would need to use all the pins on the ATTINY85 and have no extra IO pins.

I think you may have to think about a MCU with some more GPIOs.