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About Keil

The Keil products from ARM are the world leading development tools for Cortex-M, Cortex-R, ARM7, ARM9, C166, 251, and 8051 microcontroller families. The Keil products include C/C++ compilers, debuggers, integrated environments, RTOS, simulation models, and evaluation boards.


“As a startup we need to move fast implementing our technology in new products and with different partners. We are glad to be using Keil as a solid basis of our embedded software architecture, it allows us to select a wide range of MCUs addressing our various needs but keeping time to market short.”

Inouk Bourgon, Chief Technical Officer, Airboxlab S.A.


All ULINK adapters enable you to:

  • Download programs to your target hardware
  • Examine memory and registers
  • Single-step through programs and insert multiple breakpoints
  • Run programs in real-time
  • Program Flash Memory
  • Connect using JTAG or Serial Wire modes
  • On-the-fly debug of ARM Cortex-M based devices
  • Examine Trace information from ARM Cortex-M3 and Cortex-M4 devices


Delivers real-time data and instruction trace streaming via USB. ULINKpro supports:
  • ARM7, ARM9, and Cortex-M devices
  • Data and Instruction Trace for Cortex-M systems
  • Sophisticated application analysis including execution profiling and code coverage
  • High-Speed Flash Download


Replaces the original ULINK adapter.
  • Supports various ARM7, ARM9, Cortex-M, 8051, and C166 devices


Offers a subset of the ULINK2 features:
  • Supports ARM7, ARM9, and Cortex-M devices
  • Delivered and supported only as part of Keil or OEM Starter Kits
  • Standard 20-pin (0.1") JTAG and 10-pin (0.05") Cortex Debug connectors

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