About DElec.1

DElec.1 · 2022-09-29

I have got a custom PCB using STM32F4. I don't have any capacitor connected to the VCAP Pin and I wonder if this is necessary or not. Which is the use of VCAP and do I need to add it to my design? What can I do to solve my problem of no having one if...

DElec.1 · 2022-09-23

I want to develop my own PCB using STM32F4. I want to use one external clock (16 MHz). I wonder where I have to connect the clock: OSCIN32-OSCOUT32 (pins 3 and 4) or OSCIN-OSCOUT (HSE) (pins 5 and 6 in STM32F446RET).I can see in the development board...

DElec.1 · 2022-05-23

I want to interface two electret microphones (stereo sound) to STM32F446 chip. I don't know how to connect it or what protocol or pins I have to use. I have found a lot of information about digital microphones but nothing on this topic.Thanks.

DElec.1 · 2022-09-30

Thanks! In the case of just one VCAP pin, the capacitor's value would be 2,2+2,2 = 4,4 uF? or just 2,2 uF?

DElec.1 · 2022-09-29

So is it mandatory? I have decoupling capacitors between VDD and VSS but I don't have anything connected to VCAP pin (by the way, in my chip there is only one).

DElec.1 · 2022-09-23

In my PCB I use an external 16 MHz crystal oscillator connected directly to the OSCIN-OSC-OUT pins. The schematic includes two capacitors (value = 2 * (Cload - Cstray) = 26 pF). Do I need to set anything special (apart from basic clock configuration,...

DElec.1 · 2022-09-23

Ok, thank you. I did not know if it were necessary to add two capacitors even if you just want the HSE one. I was having some trouble trying to run code and I think it had to do with the oscillator.

DElec.1 · 2022-05-25

Yes, my employer.Thank you.

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VCAP in hardware design

STM32F4 Hardware for external clock

How can I interface an electret microphone (condenser) to STM32F4?

Re: VCAP in hardware design

Re: VCAP in hardware design

Re: STM32F4 Hardware for external clock

Re: STM32F4 Hardware for external clock

Re: How can I interface an electret microphone (condenser) to STM32F4?