@@ -52,14 +52,14 @@ Start ”KiCad” and follow the instructions:
### 2) Decoupling Capacitors
To stabilize the voltage at the pins to the MCU, decoupling capacitors are used. When assigning decoupling capacitors for a microcontroller running at 50-100MHz, 100nF ceramic capacitors are usually suitable for each power-pin.
To stabilize the voltage at the power pins on the MCU, decoupling capacitors must be provided. Use at least one small package SMD MLCC capacitor on each of the power supply pins, with a capacitance of at least 100nF.
However, this microcontroller needs additional decoupling capacitors for its internal voltage regulator and analog peripherals, you can find the datasheet by searching on internet (Hint: ”STM32F411 datasheet”).
This microcontroller also needs additional decoupling capacitors for its internal voltage regulator and analog peripherals, you can find the datasheet by searching on internet (Hint: ”STM32F411 datasheet”).
- Open the datasheet and look at the figure in section 6.1.6.
- Add capacitors to the power pins as the figure shows.
(Place component-button, click on sheet, device/C)
- Hoover over the capacitor, press ”V” and give the capacitor its value e.g.,100n.
- Hoover over the capacitor, press ”V” and give the capacitor its value e.g.100n.
- Connect them to the microcontroller using the ”wire” button. (W key)
You should have at least 8 capacitors connected to the microcontroller.
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@@ -205,7 +205,7 @@ It is very important that the pin numbering on your component is correct to the
ERC is a check that detects if you have any ”loose ends”, meaning that it will give you a warning if you have a net with only one connection. It will also give you a warning if you have drawn a net to a component but the net and the component haven’t connected. To get the ERC to work as intended, you have to mark all the unused pins with a Not-connected flag, found to the right.
- 4. Repeat point 1 until errors == 0 && warnings == 3. The GND net is not connected to a Power output, the 5 voltage neither and the capacitor connected to VCAP1 is not connected to a power output.
