Request for Reference Power and Clock Circuitry for STM32F407VGT6 Custom Board Design

[Azizbek]

Hello ST Community,

I am currently working on a project involving a fuel dispenser control panel and have been prototyping using the STM32F407VGT6 Discovery board. During the development phase, I connected the following peripherals:

• OLED display via I2C

• External EEPROM (24CXXX series)

• 4x5 matrix keypad

• RS485 transceiver via USART2 (TTL to RS485)

• RS422 transceiver via USART3 with DE/RE control on pin PD13

As the prototype phase is nearly complete, I am now preparing to design a custom PCB based on the STM32F407VGT6 microcontroller.

I kindly ask for a recommended reference schematic or design guidelines that cover the essential external circuitry for the STM32F407VGT6, specifically:

• Power supply filtering and regulation (including recommended capacitors, analog/digital separation, VCAP, etc.)

• Clock configuration (main crystal oscillator, RTC crystal, load capacitors)

• NRST and BOOT0 pin handling

• Any other critical hardware considerations to ensure reliable operation of the MCU in standalone configuration.

I will be handling the external peripherals separately, so only the core MCU circuitry is needed.

If ST provides a minimal schematic or application note that is suitable for this case, I would appreciate it if you could share the link.

Thank you in advance for your support and best practices!

Best regards,
Azizbek

[TDK]

Here is the STM32F4 hardware design guide which covers all of these things.

Getting started with STM32F4xxxx MCU hardware development - Application note

There are also a number of boards from ST from which you can use schematics for reference. Here is one of them:

https://www.st.com/en/evaluation-tools/stm32f4discovery.html#cad-resources