STMicro Discovery-F3 UEXT BaseBoard, 4-layer PCB and two 2x25 Sockets

  • STM32-F3U breakout board for the STMicro Discovery F3 board (STM32F3DISCOVERY) with STM32F303VCT6 microcontroller
  • Eleven GPIO port headers providing 8 data bits and 3V/5V power.
  • Four UEXT connector footprints provide UART, I2C, and SPI signals on 10-pin headers.
  • Bare PCB with two 2x25 DIL sockets provided for Discovery-F3 headers.
  • All thru-hole construction allows for easy assembly.
  • 4-layer, FR4 glass-epoxy PCB, 1oz/ft2 copper. Soldermask & silkscreen. Lead free and RoHS compatible. 6.30in X 3.94 (160 x 100mm).
The STM32-F3U breakout board provides port connectors and UEXT expansion headers to make it easy to prototype with the ST Micro Discovery F3 board.

The Discovery F3 module includes a STM32F303VCT6 microcontroller with 256k program flash, 48k RAM, and a floating-point/DSP unit in a LQFP100 package. An on-board ST-LINK/V2 programmer allows code to be loaded and debugged via PC USB port. Accelerometer, compass, and gyroscope peripherals are provided.

Eleven 2x8 headers are used for GPIO port expansion. Each header has 8 data bits, 3V power, 5V power, ground, and 5 uncommitted pins for customization.

Four Olimex style UEXT 2x5 header are used for peripheral expansion. UEXT is an open standard developed by Olimex providing 3 Volt I2C, SPI, and USART signals on one connector. A 10-pin ribbon cable is used to connect to UEXT peripheral boards.

Power comes from the Discovery board USB connector.

PCB-STM32-F3U is an unpopulated board and only the 2x25 sockets for the Discovery module are included (no other parts provided). The BOM (bill of materials) and schematic diagram are available below to construct the board. Soldering is required and prior experience with electronic assembly is recommended. Thru-hole construction allows for easy assembly, maintenance, and modification.