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Small green rectangular circuit board with a 2x5 pin header and plated pads, 14mm by 18mm

Adafruit

Adafruit SWD 2x5 1.27mm Breakout Board

SKU CH-VKJA-92D3T

Breakout board adapts 1.27 mm pitch SWD cables for JTAG debugging on ARM development boards

  • TypeEngineering Development Tools
  • Connects slim 1.27 mm pitch SWD cables to ARM dev boards
  • Breaks out 10-pin JTAG/SWD connector for easy debugging access
  • Supports Cortex M0 and M3 targets via J-Link, STLink or J-TAGulator
  • Compact 14 mm x 18 mm footprint fits tight board layouts
  • Includes header pins for flexible soldering or press-fit installation

Purpose-built adapter

This Adafruit breakout board converts the compact 2x5 1.27 mm pitch SWD connector found on many ARM development boards to standard headers for easier debugging access. It ships as a bare PCB with header pins included but without any cables. The small footprint measures 14 mm by 18 mm by 7 mm and weighs only 1 g.

Target users and limits

Engineers and hobbyists working with Cortex-M0 or Cortex-M3 boards that use the slimmer 10-pin SWD programming interface will find this adapter helpful when connecting tools such as J-Link, ST-Link or JTagulator. Buyers who need a complete cable assembly or a different pin pitch should look at other products.

Deciding specification

The board is designed specifically for the 2x5 1.27 mm pitch SWD connector; if your target hardware uses a different debug connector spacing or pin count this adapter will not fit.

Highlights

  • Connects slim 1.27 mm pitch SWD cables to ARM dev boards
  • Breaks out 10-pin JTAG/SWD connector for easy debugging access
  • Supports Cortex M0 and M3 targets via J-Link, STLink or J-TAGulator
  • Compact 14 mm x 18 mm footprint fits tight board layouts
  • Includes header pins for flexible soldering or press-fit installation

Specifications

TypeEngineering Development Tools

Questions about this item

Does the 14 mm x 18 mm board generate noticeable heat or draw extra power during long debug sessions?

The board is a passive adapter with no active components, so it adds no measurable heat or power draw while the target runs.

What cables or probes must I already have to connect this 10-pin 1.27 mm header to a J-Link or ST-Link?

You need a standard 10-pin 1.27 mm pitch SWD cable; the board only provides the breakout and headers.

Will the 0.05 inch pitch header fit the Cortex-M0 and Cortex-M3 dev boards I already use?

Yes, the 2x5 1.27 mm connector matches the slim SWD header found on many Cortex-M0 and M3 boards.

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