Because the system is continually being tuned by the Power management unit (PMU), estimating an application's current consumption can be challenging when measurements cannot be directly performed on the hardware. To facilitate the estimation process, a set of current consumption scenarios are provided to show the typical current drawn from the VDD supply.
Each scenario specifies a set of operations and conditions applying to the given scenario. The following table shows a set of common conditions used in all scenarios, unless otherwise stated in the description of a given scenario. All scenarios are listed in Electrical specification.
| Condition | Value |
|---|---|
| VDD | 3 V |
| Temperature | 25°C |
| CPU | WFI (wait for interrupt)/WFE (wait for event) sleep |
| Peripherals | All idle |
| Clock | Not running |
| Regulator | LDO |
| RAM | In System ON, full 24 kB powered. In System OFF or System ON Idle, full 24 kB retention. |
| Compiler1 | GCC v4.9.3 20150529 (arm-none-eabi-gcc). Compiler flags: -O0 -falign-functions=16 -fno-strict-aliasing -mcpu=cortex-m4 -mfloat-abi=soft -msoft-float -mthumb. |
| 32 MHz crystal2 | SMD 2520, 32 MHz, 10 pF +/- 10 ppm |
1 Applying only when CPU is running
2 Applying only when HFXO is running