SWCU193 April 2023 CC2340R2 , CC2340R5 , CC2340R5-Q1
The lowest power state that can be deliberately entered by software. In this state no oscillators are running, all voltage regulators are disabled, but I/Os retain their state. Level-based wake-up can be configured individually for each I/O pin. The device goes through a full boot when exiting SHUTDOWN, but I/Os remain latched and software is able to discern that the reset cause is I/O wake-up from SHUTDOWN. POR is active in SHUTDOWN but no other voltage supervision is enabled.