STMicroelectronics STM32103B-D/RAIS

Overview

STM32103B-D/RAIS from Raisonance is a daughterboard for the REva universal evaluation motherboard, featuring the STMicroelectronics STM32F103B8T6 ARM® Cortex™-M3 microcontroller with 64 KB Flash, 20 KB SRAM, and integrated USB 2.0 FS interface. It supports JTAG/SWD debugging via embedded RLink and enables rapid prototyping of embedded control applications on the REva platform.

For engineers reviewing the STM32103B-D/RAIS datasheet, STM32103B-D/RAIS pinout, STM32103B-D/RAIS application, or STM32103B-D/RAIS equivalent, this daughterboard delivers verified hardware integration with REva's SO-DIMM interface, USB-powered operation, and out-of-box support for RIDE7 IDE, GNU C toolchain, and real-time debugging up to 64 KB code size.

Technical Context

The STM32103B-D/RAIS implements the STM32F103B8T6 MCU in LQFP48 package, operating at up to 72 MHz with 2.0–3.6 V supply. It integrates a 12-bit ADC (1 µs conversion), three general-purpose timers, one advanced-control timer, and standard peripherals including USART, SPI, I²C, and CAN 2.0B controller.

As a daughterboard, it interfaces exclusively via the REva motherboard's 200-pin SO-DIMM connector, exposing all MCU pins-including BOOT0/1 configuration, NRST, SWDIO/SWCLK, and dedicated USB D+/D− lines-while relying on REva for power regulation (1.8 V / 3.3 V / 5 V selectable), analog sensors, LEDs, buttons, and prototyping area.

Key Specifications

Availability

STM32103B-D/RAIS is available at Aetrix Electronics and suitable for embedded control prototyping, USB peripheral development, and educational MCU evaluation requiring stable component supply and full toolchain integration.

Supply support for STM32103B-D/RAIS includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Raisonance is a French embedded tools company specializing in ARM-based development ecosystems, offering integrated debuggers, IDEs, and evaluation platforms for semiconductor partners including STMicroelectronics.

This daughterboard belongs to the REva starter kit product line, designed to accelerate evaluation and firmware development for ST's 32-bit ARM microcontrollers through modular, USB-powered, and JTAG/SWD-ready hardware-software co-design.

FAQ

Is STM32103B-D/RAIS a standalone board or does it require additional hardware?

No, STM32103B-D/RAIS is not standalone. It is a daughterboard that must be plugged into the REva universal evaluation motherboard (sold separately) via its 200-pin SO-DIMM connector. The REva provides power regulation, USB host interface, JTAG/SWD connection, and peripheral headers required for operation.

Which software tools are supported for programming and debugging STM32103B-D/RAIS?

The board is natively supported by Raisonance's RIDE7 IDE with GNU C compiler, high-level debugger, and SIMICE simulator. It also works with OpenOCD and ST-Link Utility when used with external debug probes, though embedded RLink on REva provides seamless JTAG/SWD access without extra hardware.

Does STM32103B-D/RAIS include an onboard USB connector for device-mode operation?

Yes - the daughterboard routes the STM32F103B8T6's USB D+ and D− signals to the REva motherboard's USB mini-B connector. When mounted on REva, the MCU operates as a USB Full-Speed device with no external transceiver needed, supporting CDC, HID, and DFU class implementations.

What are the key differences between STM32103B-D/RAIS and STM32107C-D/RAIS?

STM32103B-D/RAIS uses the STM32F103B8T6 (64 KB Flash, no Ethernet MAC), while STM32107C-D/RAIS uses the STM32F107VC (256 KB Flash, integrated 10/100 Ethernet MAC + USB OTG). The latter adds Ethernet and dual-role USB capability but requires more PCB layout care and larger memory footprint for TCP/IP stacks.