Power supply: consumption estimation and optimization

AN4450

14/26

DocID025978 Rev 1

3.1

Common rules for low power consumption

Here are some notes about possible sources of power leakage:

–

Do not leave any input pin un-terminated (floating). This may leave the internal

circuit in undefined state, creating/introducing extra power consumption. Connect

to VDD_IO. Use a pull-up resistor where needed.

–

Do not connect a push-pull output pin directly to GND or VDD_IO (unless it can be

ensured that no change on that pin status will be made by SW).

–

working frequency.