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c2 · 2015-04-21

Posted on April 21, 2015 at 15:18Hi everyone.In a new development with STM32F407I i have some problems with backup domain especially with internally switch Vdd/Vbat to backup domain.I use a CR3032 backup battery ( 3V lithium ) connected to Vbat pin ...

c2 · 2013-10-02

Posted on October 02, 2013 at 15:11Hi, I have some DMA problems with USB HS in Hostmode on STM32F4. I use USB Library V2.1.0 and set up USB HS with internal PHY in Host Mode and MSC., USB FS in Device Mode and MSC.If Compiler (Keil UVision) sets al...

c2 · 2015-04-22

Posted on April 22, 2015 at 11:31Dear Jan, thank you for your response.after exploration there is following behavior:switching on: Vdd rises faster than Vdd analog or Vref: no matterswitching on: Vdd rises slower than Vdd analog or Vref: no mattersw...

c2 · 2013-10-02

Posted on October 02, 2013 at 16:26Hi Jack,thank you for your reply! You are right! After many days tried to understand working of USB firmware and to get both USB cores working in a different way ( as master and host), brain was burned out. Seems t...

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STM32F407I with LQFP176 RTC registers resets when Vbat below 3.1V

STM32F4 USB DMA fault AHBERR with buffer destination in RAM Area 0x10000000

Re: STM32F407I with LQFP176 RTC registers resets when Vbat below 3.1V

Re: STM32F4 USB DMA fault AHBERR with buffer destination in RAM Area 0x10000000