STMicroelectronics STR9-COMSTICK

Overview

STR9-COMSTICK from STMicroelectronics is a complete, low-cost evaluation and development kit for the STR912FW ARM966E®-based microcontroller (96 MHz, 512+32 KB Flash, 96 KB RAM), featuring integrated 10/100 Ethernet MAC, USB Full-Speed device interface, CAN, UART, and ADC peripherals - designed for rapid prototyping of networked embedded applications including web server deployment.

For engineers reviewing the STR9-COMSTICK datasheet, STR9-COMSTICK pinout, STR9-COMSTICK application, or STR9-COMSTICK equivalent, this kit delivers in-circuit debugging via dedicated USB, unlimited GNU ARM compiler support, HiTOP IDE integration, full C source code for all sample applications, and direct access to ST's official STR9 libraries and documentation.

Technical Context

The STR9-COMSTICK implements a hardware-software co-designed evaluation platform centered on the STR912FW MCU, enabling immediate validation of real-time networking stacks (TCP/IP, HTTP) over its integrated 10/100 Ethernet MAC and USB Full-Speed peripheral. It supports bare-metal and RTOS-based development with pre-integrated drivers for CAN, UART, ADC, and Ethernet PHY interfacing.

Power is delivered entirely via USB from the host PC, eliminating external supply requirements. The board includes on-board debug circuitry compatible with Hitex HiTOP5, allowing seamless firmware download, breakpoint debugging, and memory inspection without additional JTAG adapters.

Key Specifications

Availability

STR9-COMSTICK is available at Aetrix Electronics and suitable for industrial gateway prototyping, embedded web server deployment, CAN-to-Ethernet bridge development, and educational ARM9-based networking labs requiring stable component supply and long-term toolchain support.

Supply support for STR9-COMSTICK 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, delivering microcontrollers, analog ICs, power management, and sensors for industrial, automotive, and consumer applications.

The STR9 family targets high-performance, connectivity-rich embedded control applications - specifically optimized for real-time networking, protocol bridging, and resource-constrained edge devices with Ethernet and USB interfaces.

FAQ

Does STR9-COMSTICK include an Ethernet PHY?

No. The STR9-COMSTICK integrates only the Ethernet MAC; an external PHY (e.g., LAN8720A or DP83848) must be added to establish physical-layer connectivity. Reference schematics and layout guidelines are provided in ST's STR912FW datasheet and Hitex application notes.

Is the GNU compiler included with STR9-COMSTICK truly unlimited?

Yes - the Hitex-provided GNU ARM toolchain bundled with STR9-COMSTICK has no code-size restrictions, no license expiration, and supports full optimization levels (-O2, -O3), making it suitable for production firmware builds beyond evaluation use.

Can STR9-COMSTICK run a real-time operating system (RTOS)?

Yes - the STR912FW's 96 KB SRAM and MMU-less ARM966E® core are validated with FreeRTOS, µC/OS-II, and eCos. ST provides porting layers and example projects in the official STR9 library package downloadable from st.com/mcu.

What is the role of the dedicated USB connector on STR9-COMSTICK?

It serves exclusively for in-circuit debugging and programming via Hitex HiTOP5 IDE - not for USB device functionality. The STR912FW's native USB peripheral uses a separate USB-B connector for device-mode operation (e.g., virtual COM port).