STMicroelectronics STR91X-DK/IAR

Overview

STR91X-DK/IAR from STMicroelectronics is an advanced development kit for STR91xF and STR7 ARM®-based microcontrollers, bundling IAR Embedded Workbench® for ARM (EWARM-BL512), the STR912F evaluation board, and the J-Trace in-circuit debugger/programmer with ETM™ trace support. It enables full-cycle embedded application development, including compilation, debugging, flash programming, and real-time execution trace for Ethernet, USB, CAN, I²C, SPI, UART, and ADC peripherals.

For engineers reviewing the STR91X-DK/IAR datasheet, STR91X-DK/IAR pinout, STR91X-DK/IAR application, or STR91X-DK/IAR equivalent, this kit delivers integrated toolchain validation, hardware-assisted trace capability, and out-of-box peripheral evaluation-critical for industrial control, automotive body electronics, and connected device firmware development targeting ARM7TDMI-S cores.

Technical Context

The STR91X-DK/IAR is a bundled hardware-software development system-not a semiconductor component-designed to accelerate firmware development for ST's STR91xF series (ARM7TDMI-S core, 96 MHz, 512 KB Flash, 96 KB RAM) and STR7 microcontrollers. It integrates EWARM-BL512 (512 KB code-size-limited C/C++ compiler), C-SPY debugger, J-Trace (USB-hosted JTAG interface with configurable ETM trace), and the STR912F evaluation board featuring Ethernet PHY, USB 2.0 FS, dual CAN 2.0B controllers, and 10-bit ADC.

This kit supports RTOS plug-ins for CMX-RTX, uC/OS-II, embOS, and CMX-Tiny+, and provides sample applications, flash downloader, and hardware-level debug visibility via time-stamped instruction trace-enabling deterministic timing analysis and complex interrupt path validation in safety-critical firmware.

Key Specifications

Availability

STR91X-DK/IAR is available at Aetrix Electronics and suitable for industrial automation gateways, automotive diagnostic tools, smart meter firmware validation, and medical device controller development requiring stable component supply and long-term toolchain continuity.

Supply support for STR91X-DK/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 management ICs, sensors, and analog devices for industrial, automotive, and consumer markets.

The STR91X-DK/IAR belongs to ST's legacy ARM7 development ecosystem, created to lower entry barriers for firmware teams adopting STR91xF MCUs in cost-sensitive, real-time embedded applications with connectivity requirements.

FAQ

Is STR91X-DK/IAR compatible with modern Windows OS versions?

Yes-while originally released in 2006, the STR91X-DK/IAR software components (EWARM-BL512 v5.x) run under Windows 10 and Windows 11 via compatibility mode; J-Trace hardware uses standard USB 2.0 and requires no driver updates beyond those included in modern Windows distributions.

Does this kit support debugging of STR7 microcontrollers?

Yes-the STR91X-DK/IAR explicitly supports STR7 family MCUs per ST's documentation; the bundled EWARM-BL512, C-SPY debugger, and J-Trace are configured for both STR7 and STR9 device families, enabling cross-platform firmware development and migration.

What peripherals can be evaluated directly using the STR912F board?

The STR912F evaluation board provides immediate access to Ethernet (10/100 Mbps with integrated PHY), USB 2.0 Full-Speed, dual CAN 2.0B controllers, I²C, SPI, three UARTs, and an 8-channel 10-bit ADC-no additional daughterboards or adapters required for basic peripheral validation.

Can the J-Trace included in this kit be used with other ARM7 or Cortex-M targets?

No-the J-Trace unit shipped with STR91X-DK/IAR is licensed and configured exclusively for STR91xF and STR7 MCUs; it does not support generic ARM7TDMI or Cortex-M devices without reconfiguration by IAR, which is not provided in this bundle.