nRF24AP2 as master in a SPI bus

[mdido]

Hello, I would like to use nRF24AP2 in a SPI bus with an accelerometer (a slave peripheral). I need that the host works as master with accelerometer. But in this way we will have two masters on the bus (ANT module and Host). How can I set the clock line of ANT in high impedance without using the reset? If I don't put low the signal SRDY, the clock line of ANT is in high impedance? If so, I could use the host clock as an output.

[Kenneth]

I do not see how this can be done no, the pins cannot be high impedance. Maybe you can use UART interface instead of SPI?

[mdido]

Hello, I don't have an uart available. By putting the ANT in reset, are the spi lines in high impedance? Is there another way I have to put the spi lines of ANT in high impedance?

Best regards

[Kenneth]

You may consider adding a 1kohm series resistor on the SPI pins between the nRF24AP2 and host MCU, then the host MCU should be able to control the pins whenever it wants to. 

Best regards,
Kenneth