The smallest system board based on STM32F205VE, compatible with STM32F103Vx and STM32F407Vx.

Onboard ST-Link V2.1, which integrates debugging, serial port, USB download and integration.

New features:

Optimized circuit design, now all GPIOs are mapped to up to 1 peripheral, no IO conflict

Optimize circuit layout

Added a set of power headers to power peripherals

RBG lights now use op amp drive (voltage follower mode) to reduce the impact on the IO output high frequency

Add EEPROM chip (AT24C02 256Byte) for fast storage of application data. It is no longer necessary to use internal Flash to simulate EEPROM, reducing wear on 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. It is now compatible with 16bit and 8Bit 8080 interface LCD screen modules.

Both EEPROM and SPI-FLASH can be selected by jumpers to enable or disable

Fix some bugs, and now better support STM32F103Vx and STM32F407Vx.

Mounting holes have been added to facilitate positioning and installation.

Optimized screen printing, the tips are clearer.

MCU features:

32-bit ARM Context-M3 core, up to 120MHz frequency

512KB ROM + 128KB SRAM

14 timers

Three 12-bit ADCs and two 12-bit DACs

FSMC function

System board features:

Onboard ST-Link V2.1

Micro-USB interface, 500mA overcurrent protection

BOOT0 switch uses toggle switch, there is also a toggle switch for switching built-in / external ST-Link

Onboard 4 status indicator LEDs, one common 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, the other two are user buttons

0.47F super capacitor, power for RTC

Note: You need another ST-Link 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 on-board ST-Link after upgrading the firmware through ST-Link Utilities. Function.