What is the correct incantation to set ram retention for the nRF52805? sd_power_ram_power_set() Is Not Defined!https://devzone.nordicsemi.com/f/nordic-q-a/96196/what-is-the-correct-incantation-to-set-ram-retention-for-the-nrf52805-sd_power_ram_power_set-is-not-definedNevermind. It appears this problem went away after I opened up several system files including the one you mentioned, then recompiling. Using Keil/uVision MDK-Lite V5.36 Windows 10 Pro SDK_17.1.0, SoftDevice s112 nRF52805 on a proprietary boarden-USTelligent Community 13Tue, 31 Jan 2023 19:10:03 GMTRE: What is the correct incantation to set ram retention for the nRF52805? sd_power_ram_power_set() Is Not Defined!https://devzone.nordicsemi.com/thread/407426?ContentTypeID=1Tue, 31 Jan 2023 19:10:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:953c02d2-8ede-40ee-bd52-2e2a776737ccVidar Berg<p>Hi,</p> <p>Yes,&nbsp;<a title="sd_power_ram_power_set" href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s112.api.v7.2.0/group___n_r_f___s_o_c___f_u_n_c_t_i_o_n_s.html?cp=5_7_0_2_2_6_2_22#ga9f1c3f64a4c56f2f6109e214cac02912">sd_power_ram_power_set</a>() is the correct function to use for this when you have a Softdevice present, and it is defined in the nrf_soc.h header.&nbsp;</p> [quote user=""]Q/A for other nRF8* devices give&nbsp;sd_power_ram_power_set() as the function to use, but my compiler throws an undefined error, blaming the system_nrf52 source.[/quote] <p>Can you please post a screenshot of the error you got? I do not see how the error could be related to&nbsp;a startup file.</p> <p>Best regards,</p> <p>Vidar</p><div style="clear:both;"></div>