SWCU194 March 2023 CC1314R10 , CC1354P10 , CC1354R10 , CC2674P10 , CC2674R10
The digital core of the CC13x4x10 and CC26x4x10 device platform is supplied by a 1.28 V regulator connected to VDDR. The output of this regulator requires an external decoupling capacitor for proper operation; this capacitor must be connected to the DCOUPL pin.
The DCOUPL pin cannot be used to supply external circuitry.
When the system is in power down, a small low-power regulator (micro LDO) with limited current capacity supplies the digital domain to ensure enabled modules still have power.