STM32 MCUs Products

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Forum Posts

5V-tolerant input pulls 5V down to 4V

Hi all:I am using an STM32407 running at 3.3V, and I have 2 inputs connected to 5V signals.One of the signals comes from an outside sensor (a data line), and the other one is connected to a 5V optocoupler populated on the same board.I have measured t...

Diez.R. by Associate II
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  • 8 replies
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Resolved! State of UART pins during a reset on STM32F439

I am having a hard time finding out the state of the UART pins while the chip is held in RESET. Are pins E2, D5, D4, and E1 held in a high-impedance state while the RESET pin H9 is pulled low? I suspect they are, but am trying to confirm through docu...

LKish.1 by Associate
  • 1322 Views
  • 3 replies
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I2C stm32F103

Hi,i come up with my question related to I2C communication using stm32F103,I would like to interface my I2C LCD (slave) with MCU ( master), but i have a problem with the Transmit sequencei have configured the GPIO's PB6 (SCL) and PB7(SDA) as open dra...

0693W00000ANH9uQAH.png
SIDRI.1 by Associate III
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  • 0 replies
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digital clock in custom container

Hi, I have a custom container that includes a digital clock. But when I set the clock any initial time, it starts from 00:00:00. How do I set the clock to the initial time that I want?

Ezgi by Senior
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  • 2 replies
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Resolved! ADC VREFINT value not accurate?

Hi!MCU: STM32L433VCTCubeMX, HAL12bit ADCADC clock is 250kHz637,5 cycles on every channelVREFBUF is disabledVDD is 3V3I'm currently trying to measure VREFINT and "compare" it to the value stored in the flash, to get accurate ADC measurements. The stor...