About RLind.3

RLind.3 · 2022-09-11

Hi there,I am using the STM32WLE4C8 and I am trying to write a safe handler for the NMI interrupt. From what I can tell, the NMI interrupt is triggered by a flash double ECC error, an HSE failure, or an SRAM parity error. All of these are fairly seri...

RLind.3 · 2022-09-06

Hi there,I am using an STM32WLE4C8 with FSK and I am trying to determine the offset between the internal carrier frequency and an incoming carrier frequency. This offset will be used to calibrate my device using a high accuracy incoming preamble and ...

RLind.3 · 2022-07-10

Hi there,I am using an STM32WLE and putting it into Standby mode for extended periods of time. I am trying to retain SRAM2 while in Standby mode, and it is working while the DBGMCU_CR_DBG_STANDBY bit is set. However, when I clear the bit SRAM2 is no ...

RLind.3 · 2022-06-08

Hi there,I am using an STM32WLE and I am trying to reduce my Standby mode current consumption. I am currently drawing around 800nA, while the datasheet says I should be drawing about 450nA. One potential cause of excess current is the LSI running for...

RLind.3 · 2022-06-01

Hi there,I am using an STM32WLE with an input voltage range of 2 - 3.3V. It will eventually be powered by a lithium coin cell, but I am currently using a benchtop power supply. The datasheet states that both the MCU and the radio should function down...

RLind.3 · 2022-09-07

Thanks Louis, this fixed my problem and I can now calibrate my device successfully! Thank you! 

RLind.3 · 2022-07-13

The problem has been resolved. It was an error in my linker, the address I had for SRAM2 was wrong. Fixing the address fixed the problem and my SRAM2 is now retained regardless of DBGMCU_CR_DBG_STANDBY.

RLind.3 · 2022-07-11

Hi Danish,When the MCU wakes, the PWR_EXTSCR_C1SBF is set, so I believe it is in Standby rather than Shutdown.Setting DBGMCU_CR_DBG_STANDBY maintains power to the core and keeps the processor clocks active. From the reference manual, "The STM32WLEx d...

RLind.3 · 2022-06-12

Hi Benoit,Thanks for your response. Could you please clarify the following points?Does the IWDG continue running through a Standby reset?Can I disable the LSI while the IWDG is running? What behaviour will this cause?Thanks,Rebecca

RLind.3 · 2022-06-01

Hi all,Turns out it was an issue between the seat and the steering wheel. I was looking at an updated schematic that used a pin for a different function, so my PU/PD resistors were set incorrectly. The MCU now enters and exits Standby mode correctly ...

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STM32WL NMI Handler Best Practice

STM32WL CFO Registers

STM32WLE RAM Retention Only Functional in Debug Mode

STM32WLE - IWDG in Standby Mode

STM32WLE Standby Mode - Unresponsive at Low Voltages (<2.15V)

Re: STM32WL CFO Registers

Re: STM32WLE RAM Retention Only Functional in Debug Mode

Re: STM32WLE RAM Retention Only Functional in Debug Mode

Re: STM32WLE - IWDG in Standby Mode

Re: STM32WLE Standby Mode - Unresponsive at Low Voltages (<2.15V)