• STM32-VLB1 breakout board for the STMicro Discovery VL board (STM32VLDISCOVERY) with STM32F100RBT6 microcontroller
• Six GPIO port headers providing 8 data bits and 3V/5V power.
• Three ComBoard footprints provide RS232 or RS485 USART interfaces.
• Six ASPICE board footprints provide I2C, and SPI expansion signals on 14-pin headers.
• SD card connector footprint provided.
• Mostly thru-hole construction allows for easy assembly and expansion (optional power input, JTAG header and SD card have SMT parts).
• 2-layer, FR4 glass-epoxy PCB, 1oz/ft2 copper. Soldermask & silkscreen. Lead free and RoHS compatible. 6.30 x 6.30in (160 x 160mm).

The STM32-VLB1 breakout board provides port connectors, USART, I2C, and SPI expansion headers to make it easy to prototype with the ST Micro Discovery VL board.

The Discovery VL module includes a STM32F100RBT6 microcontroller with 128k program flash, 8k RAM, in a LQFP64 package. An on-board ST-LINK/V2 programmer allows code to be loaded and debugged via PC USB port. Power comes from the Discovery board USB connector or a barrel connector.

Six 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.

Three ComBoard module footprints allow RS232 or RS485 serial interfaces to be added and quickly changed. Six ASPICE module footprints allow I2C, SPI or analog modules to be added. Other footprints include: SD card with activity LED and power switch circuitry. RTC CR2032 battery holder. Barrel power connector and filter.

PCB-STM32-VLB1 is an unpopulated board and no parts are 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.