AnsweredAssumed Answered

STM32F429x don't start - Vcap problems...

Question asked by kecskes.gergely on Oct 1, 2015
Latest reply on Oct 6, 2015 by kecskes.gergely
Hello there!

I've desingned a board for a project with a new STM32F429VGT6 controller. My main problem is that I cannot program the controller, ST-Link says it "can not connect to target". Of course, I've already checked, the controller gets 3.3V, and the SWO pinout is also good.

I went through the datasheet again, and I I've found out, that on the Vcap1,2 pins I should measure around 1.2V. But I'm only getting some mV. I'm using 2.2uF capicators, with low ESR value. I have no idea what causes the problem, and at this point I'm pretty much stucked... :(

I've attached my board pinout, maybe it helps. 
f429_pinout.png

Thanks for the help in advanced!

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