TASKS_CONSTLAT is not working on NRF54L15

[gandyhuang]

HI,

I am using "NRF_POWER->TASKS_CONSTLAT = 1;" to enable CONSTLAT, but when i  printf("TASKS_CONSTLAT %d",NRF_POWER->CONSTLATSTAT); the result is still 0; how can i  config it? thanks

  

[gandyhuang]

the  NCS  version is V2.8.0

[Simonr]

Hi

Please make sure you set the following config in your project config file in your project. 

CONFIG_SOC_NRF_FORCE_CONSTLAT

Best regards,

Simon

[gandyhuang]

HI Simon,

Thanks. can i use NRF_POWER->TASKS_LOWPWR go Into Lowpower mode when CONFIG_SOC_NRF_FORCE_CONSTLAT ?

[gandyhuang]

HI,

I had tested to config CONFIG_SOC_NRF_FORCE_CONSTLAT In project,  debug and trace the fw, the NRF_POWER->CONSTLATSTAT is still Diable.

[Simonr]

Hi

What sample project is your project based on, and do you see any build warnings or similar when setting the CONSTLAT config? Also, what file did you set the config in on your end? The prj.conf file or some other file? 

If the force constant-latency mode config is set it should force it to be set, so that you can't go into low power mode while set. This should only be used if you need the device to always be in Constant Latency mode.

Best regards,

Simon