ARM JTAG 20 10 olimex ltd . Sockets & Adapters JTAG 20 PIN 0.1" TO 10 PIN 0.05" ADAPTER ARM USB OCD H, ARM USB TINY H JLINK V9 V|pin pin|pin 20jtag pins - AliExpress
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The popular Olimex ARM OpenOCD JTAG programmer debugger ARM-USB-OCD-H gets better, now has a modification which works with targets from 0.65 up to 5.5V | olimex
Using OpenOCD to flash ARM Cortex M3
ARM-USB-OCD-H Olimex LTD | Development Boards, Kits, Programmers | DigiKey