I am developing a low-power application and need to add a button-input. As the MCU (STM32WLE5) is in sleep (STOP2) most of the time (waking up by RTC every 30 seconds), the button press needs to trigger an interrupt which also wakes up the MCU.FYI, m...
Some strange behaviour that I can't explain but like to understand :I am using an e-paper display via SPI, and to conserve power during sleep, I power down the display via a FET.After waking up, I enable the power to the display, then initialize the ...
I'm developing a low-power device using the STM32WLE5.To reduce power consumption of the peripherals (sensors / display / eeprom) during the sleep of the MCU, all these peripherals are switched off with a P-channel mosfet as shown in this part of the...
Previous I2C EEPROM chips had (eg) 3 address pins A2..A0, where you could hardware the I2C address. This allowed up to 8 devices on the same I2C bus in case you need more storage capacity.With the M24M01E this is no longer the case : the device can h...
Most I2C EEPROM (eg M24M01E) need some time after a write command to transfer the written data into the internal EEPROM. During that time (eg max 3.5 ms) the device does not respond to I2C.My question is about the timeOut parameter in the HAL_I2C_Mem...
Hi @AScha.3 ,thanks for your advice. I decided to measure the power consumption (I am using Nordic Power Profiler Kit II).So I changed to firmware to use PB3 as a EXTI GPIO and to my big surprise, this is working with no extra current consumption. So...
Maybe one more question here :is it possibe to somehow 'see' trace in the MCU that a brown-out happened ? If possible, I could add that to the NMI / HardFault handlers and confirm my assumptions.
This is apparently due to a power glitch caused by the inrush current of the display. I can't really see it on the scope, but if I enable the power slowly (avoiding the inrush current), then the hard fault does not occur.
Thank you. I was not aware the the ADC inputs are FT type.So I will either choose a better resistor or may decide to keep the output activated in sleep mode. I'll do some power consumption measurements to further decide.Thanks for your excellent advi...
