STMicroelectronics STR912-D/RAIS

Overview

STR912-D/RAIS from Raisonance is a daughterboard evaluation module featuring the STR912F microcontroller - an ARM966E-S core-based 32-bit MCU with 512 KB Flash, 96 KB RAM, USB 2.0 OTG, CAN 2.0B, and Ethernet MAC. It plugs into the REva universal motherboard via SO-DIMM connector for rapid prototyping of industrial connectivity applications.

For engineers reviewing the STR912-D/RAIS datasheet, STR912-D/RAIS pinout, STR912-D/RAIS application, or STR912-D/RAIS equivalent, this module enables hands-on validation of ARM966E-S real-time performance, dual-CAN node behavior, USB device/host switching, and Ethernet MAC interface timing in embedded control systems.

Technical Context

The STR912-D/RAIS implements STMicroelectronics' STR91xF family architecture on a compact daughterboard, integrating full-speed USB 2.0 OTG with internal transceiver, dual CAN 2.0B controllers with dedicated message RAM, and a 10/100 Mbps Ethernet MAC with MII interface. It supports ETM trace via dedicated footprint for external debug tools.

Power is supplied through the REva motherboard's USB-powered 3.3 V rail, with configurable boot mode and CAN termination jumpers onboard. The board routes all STR912F I/O signals-including ADC inputs, USARTs, SPI, I²C, and GPIO-to edge connectors compatible with REva's SO-DIMM interface.

Key Specifications

Availability

STR912-D/RAIS is available at Aetrix Electronics and suitable for industrial gateway development, factory automation controller evaluation, and embedded networking prototyping requiring stable component supply and long-term toolchain support.

Supply support for STR912-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 hardware and software, acquired by STMicroelectronics in 2012 to strengthen ecosystem support for ST MCUs.

This daughterboard belongs to the REva starter kit product line, designed specifically to accelerate evaluation and firmware development for ST's legacy ARM7TDMI, ARM966E-S, and Cortex-M3 microcontrollers in industrial and connectivity applications.

FAQ

Does STR912-D/RAIS include the STR912F microcontroller pre-soldered?

Yes. The STR912-D/RAIS daughterboard ships with the STR912FZ2T6 microcontroller (LQFP144 package) fully assembled and tested. No additional MCU mounting or configuration is required before plugging into the REva motherboard.

What software tools are supported for STR912-D/RAIS development?

RIDE7 IDE with GNU ARM C compiler, RFlasher programming utility, and SIMICE simulator are natively supported. Debugging uses the embedded RLink JTAG interface; ETM trace requires optional Signum JTAGjet hardware and license.

Can STR912-D/RAIS operate independently without the REva motherboard?

No. STR912-D/RAIS is a daughterboard only - it lacks power regulation, USB interface, JTAG debugger, and peripheral headers. It must be mounted on the REva universal evaluation motherboard (order code STR91X-SK/RAI) to function.

Is Ethernet PHY included on the STR912-D/RAIS board?

No. The board includes only the Ethernet MAC layer. An external PHY (e.g., SMSC LAN8720A or DP83848) must be connected via the MII interface on the REva motherboard's expansion area or daughterboard edge connector.