SWCU192 November 2021 CC1312R7 , CC1352P7 , CC2652P7 , CC2652R7
Shutdown mode is defined as having no active power regulator in the CC13x2x7 and CC26x2x7 device platform. It is not recommended to use shutdown as a power mode to conserve power during normal operation of the device.
Before putting the CC13x2x7 and CC26x2x7 device platform in shutdown mode, I/O pins are latched to keep their output values in shutdown—this is the only difference between holding the devices in reset with the reset pin and shutdown mode.
Only an enabled pin interrupt or reset pin can wake up the CC13x2x7 and CC26x2x7 device platform from shutdown mode.
A wake-up event to wake up from shutdown is not detected until the device reaches shutdown. Wake-up events happening after a shutdown is initiated but before actual shutdown are not captured and thus will not cause the device to wake up.
| Description | Register | Required Step |
|---|---|---|
| Configure the wake-up pin | IOC:IOCFGxx.WU_CFG | Yes |
| Synchronize transactions to AON domain | AON_RTC.SYNC | Yes (Read register) |
| Enable shutdown and latch I/Os | AON_PMCTL:SHUTDOWN.EN | Yes |
| Stop the system CPU to start the power-down sequence | WFI or WFE | Yes |