The AK-CMSIS-DAP board is a JTAG/SWD probe based on the CMSIS-DAP (also known as DAPLink) protocol standard. It can be used to debug and download code to any ARM Cortex microcontroller. The CMSIS-DAP standard is supported by many of the most known development and debugging tools, including KEIL uVision, IAR Embedded Workbench and OpenOCD.

The AK-CMSIS-DAP JTAG/SWD board is the Artekit implementation of the CMSIS-DAP standard, running on quartzless SiLabs Happy Gecko EFM32 Cortex M0+ (the EFM32HG308F64G-B-QFN24), with 64KB Flash and 8KB RAM running at 25 MHz, completely open source and open hardware.

The board comes with a standard 20-pin JTAG connector and can be used with microcontrollers featuring the full JTAG interface or two-wires SWD (Serial Wire Debug) interface. The board only requires an USB-mini cable to connect it to the host.

The AK-CMSIS-DAP has an unique feature that is the inclusion of buffers for the input/output signals, so the voltage of the AK-CMSIS-DAP board will be adapted to that of the target. There are also two indicator LEDs, and a button to trigger the firmware update

No drivers required: the CMSIS-DAP protocol travels on top of the USB HID protocol, so it can be used with any operating system.

You can learn more about the AK-CMSIS-DAP in the user guide we have prepared.


  • Full JTAG or SWD interfaces
  • Buffered input/output signals
  • Powered by USB
  • Compatible with many flashing and development tools




Additional information

Weight 0.010 kg
Dimensions 48 × 27 × 8 mm



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Ultra low-cost ARM Cortex JTAG/SWD debugger based on the CMSIS-DAP standard.


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