As the system is constantly tuned by the PMU described in Power and clock management, estimating the current consumption of an application can be challenging if the designer cannot 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 that apply to the given scenario. The following table shows a set of common conditions used in all scenarios, unless otherwise is stated in the scenario's description. Similarly, Current consumption scenarios, common conditions for LTE modem describes the conditions used for the modem current consumption specifications. For a list of all scenarios, see Electrical specification.
Peripherals typically share one or more power sources. This results in a current consumption that does not scale linearly with the number of peripherals enabled. For example, the current consumption for an application with two peripherals enabled, is not the sum of the currents reported by their individual peripherals.
Condition | Value |
---|---|
Supply | 3.7 V |
Temperature | 25 °C |
CPU | WFI (wait for interrupt)/WFE (wait for event) sleep |
Peripherals | All idle1 |
Clock | HFCLK=HFINT Not running LFCLK=Not running |
RAM | No retention |
Cache enabled | Yes |
Condition |
---|
Cat-M1 and Cat-NB1 HD FDD mode |
Good channel, RF cable, no errors in DL/UL communication |
Minimum network response times |
Output power at antenna port, single-ended 50 Ω |
Modem eDRX current consumption quoted with UICC that allows UICC supply shut down at eDRX intervals. 2 3 4 |
Modem PSM TAU event energy is measured from the modem PSM wake-up until end of RX inactivity time |
All LTE modem current consumption numbers include application core idle mode consumption 5 |