[28] SAADC: Events are not generated when switching from scan mode to no-scan mode

nRF9161 Revision 1 Errata

This anomaly applies to Revision 1, build codes LACA-A0A.

It was inherited from the previous IC revision Engineering A.

Symptoms

SAADC stops working.

Conditions

  • Switching from multiple channels to a single channel when BURST is disabled and acquisition time is <10 us
  • Switching from multiple channels to a single channel when BURST is enabled

Consequences

SAADC internally locks up and does not generate the expected events.

Workaround

Execute the following code before changing the channel configuration.
  • Secure mode: 
    
NRF_SAADC_S->TASKS_STOP = 1;
  • Non-secure mode: 
    
NRF_SAADC_NS->TASKS_STOP = 1;