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KL03 SPI: SS pin high between byte transfers how to keep it low?

Question asked by Cian Donovan on Nov 4, 2016
Latest reply on Nov 6, 2016 by Mark Butcher

Hi there,

 

I'm using the FRDM-KL03 development board to communicate over SPI with a nRF24L01+ radio. The radio requires a continuous low signal on Slave Select for the entire period of transfer, yet the KL03 pulses the SS pin high between each byte transfer, confusing the radio into thinking that transmission has restarted. I have read through the KL03 reference manual and couldn't find anything on keeping the SS pin continuously low throughout the transfer. Is there a way to disable this auto high-pulse?  

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