Low-cost ARM USB JTAG (supported by OpenOCD open source ARM debugger)
Price39.95 EUR
10 - 49 pcs35.96 EUR
50 - 10000 pcs31.96 EUR
In stock


  • Debugs all ARM microcontrollers with JTAG interface supported by OpenOCD
  • Fast speed USB 2.0 JTAG dongle interface, can be used with all ARM devices for programming and debugging.
  • Uses ARM's standard 2x10 pin JTAG connector
  • Supports ARM targets working in voltage range 2.0 – 5.0 V DC
  • Software supported by OpenOCD (open source) debugger
  • Downloadable Windows installer for full featured and open source tools as alternative to the commercial ARM
    development packages: GCC C compiler, openOCD debugger and Eclipse IDE.
  • Works with IAR EW-ARM 5.50 or newer
  • Dimensions 50x40 mm (2x1.6") + 20 cm (8") JTAG cable




  • Can I use ARM-USB-TINY with EW-ARM?
  • IAR have support for GDB and work with ARM-USB-TINY.
  • I use Windows XP x64, how I can update the USB drivers?
  • FTDI have x64 drivers on their web, download them and use our ARM-USB-TINY PID: 0x0004, VID: 0x15BA to install the drivers.
  • I have LPC1227 board and can't program it with your OpenOCD debugger. What do I do wrong?
  • LPC1227 lacks JTAG according to the microcontroller's datasheet. The board can be programmed only via SWD (Serial Wire Debug) interface. Olimex OpenOCD debuggers have JTAG by default.
  • How to install ARM-USB-TINY to work with CrossWorks:
  • There is profile for ARM-USB-TINY in CrossWorks, but if you want to use "Generic FTD2232" target interface you have to do as follows:

    1. Right click on a blank space in the targets window and select "New Target Interface > Generic FT2232 Device".
    2. Right click on the new target interface and select "Properties" - set the following properties:
      Connected LED Inversion Mask 0x0000
      Connected LED Mask = 0x0800
      nSRST Inversion Mask = 0x0200
      nSRST Mask = 0x0200
      nTRST Inversion Mask = 0x0000
      nTRST Mask = 0x0100
      Output Pins = 0x0F1B
      Output Value = 0x0D08
      Running LED Inversion Mask = 0x0000
      Running LED Mask = 0x0800

    PID: 0x0004
    VID: 0x15ba

    In CrossWorks 1.7 there are Target interfaces for Olimex JTAGs, note that RTCK is not used with a FT2232 design so your JTAG clock should not exceed 1/6 of your target MCU clock or the JTAG will lock up. Start with JTAG divider 10 and decrease until you are able to debug to find your own value for your target.

  • What is the difference between ARM-USB-OCD and ARM-USB-TINY?
  • ARM-USB-TINY is stripped down version of ARM-USB-OCD, the differences are: no output buffers just current limitation resistor protectors, no RS232, no power supply to target.
  • Can I debug high voltage targets with ARM-USB-TINY?
  • ARM-USB-TINY is not isolated, but you can use USB-ISO isolator device to protect your PC while debugging high voltage targets.

Related Products

Price4.95 EUR
10 - 49 pcs4.46 EUR
50 - 10000 pcs3.96 EUR
Price2.00 EUR
10 - 49 pcs1.80 EUR
50 - 10000 pcs1.60 EUR