Current consumption

As the system is being constantly tuned by the Power management unit (PMU), estimating the current consumption of an application can be challenging if the designer is not able to perform measurements directly 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. Current consumption scenarios, common conditions 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.

Table 1. Current consumption scenarios, common conditions
Condition Value
Supply 3 V on VDD/VDDH (Normal voltage mode)
Temperature 25°C
CPU WFI (wait for interrupt)/WFE (wait for event) sleep
Peripherals All idle
Clock Not running
Regulator LDO
RAM Full 256 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.
Cache enabled1 Yes
32 MHz crystal2 SMD 2520, 32 MHz, 10 pF +/- 10 ppm
1 Applying only when CPU is running from flash memory
2 Applying only when HFXO is running