STMicroelectronics STR91X-SK/IAR

Overview

STR91X-SK/IAR from STMicroelectronics is an IAR Embedded Workbench®-based starter kit for STR912FAW4 ARM966E-S™ core microcontrollers, including J-Link USB/JTAG debugger, 32 KB KickStart C/C++ compiler, VisualSTATE® 20-state code generator, and a full-featured development board with LCD, CAN, Ethernet, SD/MMC, and 16 user LEDs.

For engineers reviewing the STR91X-SK/IAR datasheet, STR91X-SK/IAR pinout, STR91X-SK/IAR application, or STR91X-SK/IAR equivalent, this kit supports rapid evaluation and firmware development for industrial control, networked embedded systems, and ARM9-based real-time applications requiring integrated peripherals and debug-ready hardware.

Technical Context

The STR91X-SK/IAR integrates a production-grade STR912FAW4 (ARM966E-S core, 96 MHz, 512 KB Flash, 96 KB RAM) on a self-powered development board. It provides native JTAG debugging via 20-pin interface and full peripheral access including dual CAN 2.0B controllers, 10/100 Ethernet MAC, USB 2.0 host, and 8-channel 10-bit ADC with potentiometer input.

Hardware abstraction is enabled by pre-integrated IAR C-SPY® debugger support and built-in Flash loader; software toolchain includes VisualSTATE® for state-machine-driven firmware and EWARM IDE with editor, linker, and librarian tools-all licensed for ≤32 KB output code size.

Key Specifications

Availability

STR91X-SK/IAR is available at Aetrix Electronics and suitable for industrial automation prototyping, embedded networking development, and ARM9-based real-time control system validation requiring stable component supply and full toolchain integration.

Supply support for STR91X-SK/IAR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing microcontrollers, power ICs, sensors, and analog devices for industrial, automotive, and consumer markets.

This kit belongs to ST's ARM-based microcontroller evaluation platform family, engineered to accelerate adoption of STR91x series in connectivity-rich embedded applications with integrated CAN, Ethernet, and USB host functionality.

FAQ

Does STR91X-SK/IAR include a production-programmable STR912FAW4 microcontroller?

Yes. The kit ships with a fully functional STR912FAW4 microcontroller soldered onto the board, featuring 512 KB Flash and 96 KB RAM. It supports in-circuit programming and debugging via J-Link, and all Flash sectors are accessible for user firmware deployment without hardware modification.

Is the IAR EWARM license included with perpetual usage rights?

No. The included IAR EWARM KickStart edition grants perpetual use but restricts generated code size to 32 KB. It does not include source-level debugging beyond the KickStart feature set, nor entitlement to IAR technical support or future version upgrades without separate licensing.

Can the STR91X-SK/IAR board be used for final product design verification?

Yes - the board implements production-relevant signal routing, power regulation, and peripheral interfaces (CAN, Ethernet, USB host) matching STR912FAW4 datasheet specifications. However, its layout and component selection are optimized for evaluation, not for certified EMI/EMC or long-term field deployment without redesign.

Does the kit support real-time OS (RTOS) porting and testing?

Yes. The STR912FAW4's ARM966E-S core, MMU support, and on-board peripherals enable porting and validation of FreeRTOS, µC/OS-II, and other RTOS kernels. Sample projects and memory-mapped drivers provided in the kit simplify BSP development and interrupt latency measurement.