FAQs
cancel
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for 
Search instead for 
Did you mean: 

LPUART consumes extra 3mA while STOP2 mode

Charles_Li
Associate II

‎2024-12-03 10:46 PM - edited ‎2024-12-03 11:27 PM

I'm using STM32WB55. The reference example is BLE_p2pServer with custom modifications. The power consumption of STOP2 mode ( by enabling CFG_LPM_SUPPORTED ) is around 6mA (board level), and it will be around 9mA after LPUART is enabled with RCC_LPUART1CLKSOURCE_HSI. Is that reasonable?

If (3.85+5.25)*64 is the correct extra current consumption of LPUART in STOP mode?

Charles_Li_0-1733297038620.png

 

Labels:
0 Kudos
1 REPLY 1
Sarra.S
ST Employee

‎2024-12-04 01:43 AM

Hello @Charles_Li,

The calculated extra current is in the range of 0.576mA, yes, which is significantly lower than the observed increase of 3mA. Is there any other active peripherals? 

This application note is however worth checking: How to optimize LPUART power consumption on STM32 MCUs

 

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

Top