SPRACF4C June 2018 – January 2023 AWR1243 , AWR1443 , AWR1642 , AWR1843 , AWR1843AOP , AWR2243 , AWR2944 , AWR6843 , AWR6843AOP , IWR1843 , IWR6443 , IWR6843 , IWR6843AOP
TI’s mmWave radar devices support the calibrations described in the following sections. All calibrations can be performed at the RF initialization phase (when the RfInit() API is called during the power up), and some can also be carried out at runtime. The user can select the calibrations to be executed at RfInit and runtime using the AWR_RF_INIT_CALIBRATION_CONF_SB API (to be called before RfInit API) and the AWR_RUN_TIME_CALIBRATION_CONF_AND_TRIGGER_SB API. Two of these calibrations (APLL and Synthesizer VCO calibrations) are always enabled at boot time and at runtime, and cannot be disabled. The time required for these two calibrations, and for all enabled periodic runtime calibrations, must be budgeted for when defining the frame configuration. More details can be found in the Interface Control Document available as part of the mmwave DFP package.
If a calibration is disabled at the RF initialization phase, it cannot be enabled at run time. In this case, the corresponding blocks always use fixed settings and will not compensate for changes device process variation and in temperature.
The term "boot time" in this document refers to the RF initialization phase.