Sleep Mode Overview
The SAM L10/L11 have three Sleep modes available through the Power Manager (PM), as summarized below:
Each sleep mode offers different flexibility and capability for the device to wake-up. The figure below shows the resultant device status across all Sleep modes:
Related Peripherals
A related peripheral that controls Sleep modes is thePower Manager.
Sleep Mode Selection
After a device reset, the device is operating atPerformance Level 0 (PL0), in Active mode.
While the performance level selection is done through the selection bits in the Performance Level Configuration register (PLCFG.PLSEL), the Sleep Mode configuration bits are in the Sleep Configuration register (SLEEPCFG.SLEEPMODE). These bits are used to select the level of the Sleep mode.
There is a small latency between the store instruction and actual writing of the SLEEPCFG register due to bridges. The software must ensure that the SLEEPCFG register reads the desired valuebefore issuing a Wait For Interrupt (WFI) instruction.
Sleep mode is then entered by executing the WFI instruction.
Code Example: Configuring the device in STANDBY sleep mode allowing the device to get the best power efficiency
Related Sections
