STM32 MCUs Products

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Resolved! SysTick calibration values

Posted on June 13, 2016 at 17:40Part of ARM's specification of the core (as given by ARM® v7-M Architecture Reference Manual, or ARMv7M ARM for short :) ) is the SysTick counter, and part of that counter is a read-only register, containing a calibr...

STM32F405 ''Held in Reset State'' Problem

Posted on June 02, 2017 at 10:44Hi everyone,I cannot connect the STM32F405RG MCU with ST-Link Utility and IAR Embedded Workbench.I need your help, How can i connect MCU again ?I tried  Connection Settings -->   SWDMode -->             Connect Under ...

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STM32F103 use PB4 and PB5 as USART TX-RX?

Posted on June 01, 2017 at 18:53Hello to the community,Due to an error on a board routing I have ended with a bunch of boards with the RX and TX pins of USART1 incorrectly routed to PB4 and PB5 pins of STM32F103.I wonder if there is any human way of...

Can 5 V tolerant pin be turned off?

Posted on May 30, 2017 at 11:26Hi,I am using the NUCLEO - L053R8 circuit board.I question about 5 V tolerant function.A pull-up resistor driven by 5 V is added to the port of PA_8.In this case, when setting the open drain setting, 0.1 mA flows.Howev...

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help for an optical sensor project

Posted on June 01, 2017 at 13:10HiI am a new ingineer (still student in ingineering school) and I need to test the possibility to use some optical fiber sensor in order to mesure a mouvement (inside a black cavity or by reading a black and white rul...