SWCU194 March 2023 CC1314R10 , CC1354P10 , CC1354R10 , CC2674P10 , CC2674R10
Some CC13x4x10 and CC26x4x10 devices have an option to be supplied by an external regulator with a voltage range of 1.65 V to 1.95 V. In this mode, the VDDS and VDDR pins are tied together. To enable external regulator mode, the VDDS_DCDC pin and the DCDC_SW pins must be connected to ground, which effectively disables both the internal Global LDO and the internal DC/DC regulator.