frequency of analog input pins

[kunchalaRajesh]

hi team,

i have trying to wrote a code for adc module in segger 5.40 using nrf52840 controller and i found you mentioned different frequencies for each pins in datasheet.

you just mentioned as a it will take low frequency I/O only. but what is that mean and how much that frequency is and what is the frequency of  other pins.  did not mention in datasheet 

please provide... a document regarding that ...pins frequency.

[Kazi Afroza Sultana]

Hello,

Low frequency I/O is a signal with a frequency up to 10 kHz. You cannot use the pins which marked as ''Low frequency I/O only'' for high frequency peripherals. 

''Radio performance parameters, such as sensitivity, may be affected by high frequency digital I/O with large sink/source current close to the Radio power supply and antenna pins''

https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/pin.html?cp=4_2_0_3_2#concept_rfc_x1z_2q 

So, if you're planning to use the radio when LEDs are running and configured in for high drive, you cannot use these pins which are only for low frequency I/O only.

Thanks.

Best Regards,

Kazi Afroza Sultana