STMicroelectronics STM8S/32-D/RAIS

Overview

STM8S/32-D/RAIS from Raisonance is a standalone interchangeable daughterboard featuring the STM8S105C6 8-bit microcontroller in LQFP48 package, supporting SWIM-based in-circuit debugging and programming, with on-board clock source selection jumper and oscillator footprint for flexible timing configuration. It enables rapid application development for industrial control, sensor interface, and appliance MCU firmware.

For engineers reviewing the STM8S/32-D/RAIS datasheet, STM8S/32-D/RAIS pinout, STM8S/32-D/RAIS application, or STM8S/32-D/RAIS equivalent, this board delivers verified hardware compatibility with REva motherboard, integrated SWIM connectivity, configurable VDD (1.8 V / 3.3 V / 5 V), and full Ride7 IDE support including RBuilder peripheral initialization and SIMICE simulation.

Technical Context

The STM8S/32-D/RAIS implements an STM8S105C6 MCU - a 16 MHz max frequency, 32 KB Flash, 2 KB RAM, 1 KB EEPROM device with 5-channel ADC, UART, SPI, I²C, and 16-bit timers. It interfaces exclusively via ST's SWIM (Single Wire Interface Module) protocol for debug and programming.

Designed as a plug-in daughterboard for the REva motherboard, it leverages the standard SO-DIMM connector and shares access to digital/analog I/O headers, on-board temperature sensor, potentiometer, I²C EEPROM, RS-232 transceiver, and prototype area - all powered over USB without external supply.

Key Specifications

Availability

STM8S/32-D/RAIS is available at Aetrix Electronics and suitable for industrial control prototyping, sensor node firmware validation, and white-goods MCU development requiring stable component supply and long-term toolchain continuity.

Supply support for STM8S/32-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 France-based embedded tools developer specializing in MCU evaluation platforms, debug probes, and integrated development environments for STMicroelectronics, Silicon Labs, and other semiconductor vendors.

This daughterboard belongs to the REva evaluation platform family, designed specifically to accelerate firmware development across STM8 and ST7 microcontroller families using standardized hardware abstraction and unified software tooling.

FAQ

Is STM8S/32-D/RAIS compatible with ST-LINK programmers?

No. STM8S/32-D/RAIS requires the embedded RLink interface built into the REva motherboard and is not electrically or protocol-compatible with ST-LINK. It uses ST's proprietary SWIM protocol, which only RLink and select Raisonance tools support.

Does this daughterboard include a debugger or require external hardware?

It does not include a standalone debugger. STM8S/32-D/RAIS must be used with the REva motherboard, which integrates the RLink USB debug/programming interface. No external debug probe is needed beyond the REva system.

What voltage levels does the STM8S105C6 operate at on this board?

The board supports 1.8 V, 3.3 V, and 5 V VDD configurations via jumper settings. The STM8S105C6 itself is rated for 2.95–5.5 V operation; the 1.8 V setting is achieved via onboard regulator and applies only to selected peripherals during low-power evaluation.

Can I use this board with modern Windows 10/11 systems and current Ride7 versions?

Yes. Raisonance provides updated USB drivers and Ride7 v7.x+ releases fully compatible with Windows 10 and 11. The SWIM protocol stack and REva hardware abstraction layer are maintained for ongoing legacy MCU support.