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New possibilities for the ultra-low power segment!

STM32U0 is the first Cortex-M0+ with a static consumption of only 160 nA in standby mode with RTC (Real-Time Clock) and 16 nA in shutdown. It also achieves 118 points in CoreMark and targets SESIP level 3 and PSA level 1 focusing on firmware code pro...

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STM32L451 strange RTC issue

Posted on July 11, 2018 at 17:03I'm curious if anyone else has seen this issue.We are using 20 ppm LSE at 32768hz as the clock source for our RTC.  Over an 8 hour period, we are a few seconds off vs. the expected max of .6 S for the 20 ppm.Our syste...

mhage by Associate II
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HAL_SPI_Transmit/HAL_SPI_TransmitReceive timeout

Posted on July 11, 2018 at 20:13Hi,I used to have the SPI1 working connected to MAX31865 breakout board. For some reason it's not working at all now. I traced into the code, seems HAL_SPI_Transmit() failed on __HAL_SPI_GET_FLAG(hspi, SPI_FLAG_TXE) u...

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Trouble entering STOP2 on stm32l432

Posted on July 09, 2018 at 15:06I'm having trouble entering stop2 -- instead of going to stop2 my code seems to enter sleep; this is based upon measuring power levels -- I have the RTC fed by an external crystal and a 1 second interval alarm.  I can...

Geoffrey1 by Associate III
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VBAT for RTC backup

Posted on October 10, 2016 at 13:12Hello, should i connect 3V battery to Vss or Vssa for RTC backup (external 32768 resonator)? #too-vague #stm32-vbat-rtc

mailbox by Associate II
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  • 5 replies
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