2pcs JTAG Breakout Board Adapter SWD Adapter Board Jtag Debug Board with 2 Row 2.54mm Pitch 10pins Female to Female IDC Connector Flat Flexible Gray Ribbon Jumper Cable 200mm Pitch for J-Link

This is just a breakout board but it does its job.

I bought this little adapter board to use with a very common display module that Arduino enthusiasts play around with. (The JY-LKM1638 F71A 8 Digital Tube + 8 Key + 8 Double Color LED Module ). The board has two JTAG connectors for inputs and outputs and comes with a ribbon cable with the JTAG plug on both ends. I wanted a breakout module where I could plug in the other end of the ribbon cable and wire the connections to my Arduino circuit. This module provides that capability.The solution is not perfect. This module was obviously made for some specific application because the printed pin labels don’t match the functions of my display board connector. Also, when I plug in the included ribbon cable, the red wire is not on my pin1, but rather on pin 10. Neither is a deal breaker, because once I wire up my circuit I wont be reading the silk screened labels on the board and the key on the cable connector only lets you plug it in one way.No problems like those mentioned by others.Looking at the front of the module:Pin Use Use Pin1 MOSI VCC 23 NC GND 45 RESET GND 67 SCK GND 89 MIS0 GND 10Looking at the front of the JY-LKM1638 board:Pin Use Use Pin1 Vcc Gnd 23 Clk Data 45 Strobe0 Strobe1 67 Strobe2 Strobe3 89 Strobe4 Strobe5 10

The listing says it works with Atmel-ICE, but the connectors are not oriented correctly on the ribbon cable for that. You can cut off the tab and insert it the other way round and it's gonna work fine, but come on.

I am using this with a Segger EDU J-Link. Used the attached image for the connections and it is working as expected. Connected to a Nordic Semi nRF51822.

Nice board but their quality control is poor. I spent a decent amount of time trying to figure out why my debug setup wasn't working. Eventually, I looked at the solder joints for the surface mount connect under a microscope and I saw the solder past wasn't melted. I had to carefully hit each pin with the tip of my solder iron to get it to flow. The picture attached is after I made the correction. Make sure you have some rework tools if you buy these and at a min do a continuity test on each pin before using it.

Pinouts are labeled backwards compared to Adafruit. Grounds should be on keyed 1/2 of 10 pin connector. Returning for refund.

Connector fell off before first use.