pdm clock can't gernerate,

[Carey]

i use nrf52_DK to debug PDM with a digital MIC, and select the P0.09 for the PDM clk, but i have not see any clock signal output, is it right? and i also haven't see the convet date, what's wrong?

[FormerMember]

What does your code look like?

When I test here, the following code will generate a clock output:

#define PIN_CLK_OUTPUT 4


int main(void)
{ 	
		NRF_PDM->PSEL.CLK = (PIN_CLK_OUTPUT << PDM_PSEL_CLK_PIN_Pos) | (PDM_PSEL_CLK_CONNECT_Connected << PDM_PSEL_CLK_CONNECT_Pos);
			
		NRF_PDM->PDMCLKCTRL = (PDM_PDMCLKCTRL_FREQ_Default << PDM_PDMCLKCTRL_FREQ_Pos);
		
		NRF_PDM->ENABLE = (PDM_ENABLE_ENABLE_Enabled << PDM_ENABLE_ENABLE_Pos);
    
		NRF_PDM->TASKS_START = 1;
		
    while (true)
    {

    }
}