Posted on July 05, 2018 at 08:56 Hi all, I'm having a strange problem with a design using the STM32F072V8 MCU. MCU operates at 3.3V. We have a USB connector internal to the product, solely for programming the MCU via DFU. I have the BOOT0 pin...
So, I solved the issue a few months ago but have been off work since then.In my case, I had a flash memory attached to USART1 (or 2, can't remember, but doesn't matter) and another external part accessing the flash during power up. The STM32 is there...
Posted on July 09, 2018 at 02:56Hi TJ,I agree that it should work I'm not sure what you mean by check bootloader pin usage chart? I'm definitely connected to the correct physical pin because the bootloader behaviour is normal after an external reset...
Posted on July 09, 2018 at 02:14Thanks for your help JW. I am out of ideas too!I probed DP, it looks exactly the same between DISCO and my board. The only difference is on my board, the USB transactions stop after a few seconds when the host gives u...
Posted on July 07, 2018 at 01:43VDD, VDDIO, and VBAT are all connected to a single 3.3V regulator. VDDA is connected to VDD through a ferrite bead. All rails look fine. I have the reset pin connected to a SWD interface connector right next to the ch...
