STM32F103/205/407Vx small development board

The smallest system board based on STM32F205VE, compatible with STM32F103Vx and STM32F407Vx. Onboard ST-Link V2.1 integrates debugging, serial port, and USB download.

[V5.2 version update (5/24/21)]

• Add a default pull-up resistor to the CS Pin of SPI-Flash

【V5.1 version update】

• Fix silk screen error

【V5.0 version update】

• Optimize the circuit design. Now all GPIOs are mapped to at most 1 peripheral, and there will be no IO conflicts.
• Optimize circuit layout
• Added a set of power headers to power peripherals
• The RBG lamp is now driven by an op amp (voltage follower mode) to reduce the impact on the high-frequency signal output by the IO port.
• Add EEPROM chip (AT24C02 256Byte) for fast storage of application data. It is no longer necessary to use the internal Flash to simulate EEPROM, reducing wear and tear on the internal Flash.
• Add SPI-Flash to meet the need for persistent data storage.
• The LCD interface has been redesigned, retaining support for most finished modules on the market, while improving scalability. Now it is compatible with 16bit and 8Bit 8080 interface LCD screen modules.
• Both EEPROM and SPI-FLASH can be enabled or disabled via jumpers.
• Fixed some bugs and can now better support STM32F103Vx and STM32F407Vx.
• Mounting holes have been added for easy positioning and installation.
• Optimize the silk screen and make the prompts clearer.

New version pictures

【Compatibility Note】

The following models of 100-pin MCUs have been tested to work perfectly:

• STM32F407VET6( C28730 )
• STM32F407VGT6( C12345 )
• STM32F205VET6( C81869 )
• STM32F205VGT6( C44390 )

The following models of 100-pin MCUs have been tested and can operate normally. However, due to insufficient SPI peripherals of the MCU, hardware SPI cannot be used to drive SPI-Flash, and software SPI can only be used to drive:

• STM32F103VET6( C8308 )
• STM32F103VGT6( C8305 )

The following models of 100-pin MCU have not been tested, but are theoretically compatible with this development board and can use most of the peripherals on the development board:

• STM32F103VBT6( C8314 )
• STM32F103VCT6( C8313 )
• STM32F107VCT6( C8315 )
• STM32F207VGT6( C12089 )
• STM32F207VET6( C59126 )

Depending on the MCU model used, you need to selectively configure the three jumpers on the back through the following table according to the actual situation:

×: Keep open circuit; √: Need to short circuit

[Other jumper instructions]

MCU features:

• 32-bit ARM Context-M3 core, up to 120MHz frequency
• 512KB ROM + 128KB SRAM
• 14 timers
• 3 12-bit ADCs and 2 12-bit DACs
• FSMC function

System board features:

• Onboard ST-Link V2.1
• Micro-USB interface, 500mA overcurrent protection
• BOOT0 switching uses a toggle switch, and there is also a toggle switch for switching built-in/external ST-Link
• 4 onboard status indication LEDs, one common anode RGB LED for programming
• An interface compatible with most small display modules
• Micro-SD interface
• USB-FS interface
• 3 buttons, one of which is reset and the other two are user buttons
• 0.47F supercapacitor, powering RTC

Note: Another ST-Link is needed to flash the ST-Link Bootloader for the STM32F103CBT6 on the board. The firmware is in the attachment. After downloading and programming, you can use the onboard ST-Link normally after upgrading the firmware through ST-Link Utilities. function.

Proofing actual picture:

Welding finished product picture:

SD card reading experiment + FSMC driver ILI9225 LCD screen (content of the attachment routine)

Animation demonstration: