Adruino and ARM Processor interfacing via JTAG

Discussion in 'Embedded Systems and Microcontrollers' started by TierOne, Mar 31, 2011.

  1. TierOne

    Thread Starter New Member

    Feb 5, 2011
    hi all,

    I am looking into how I can make my own JTAG interface using an Adruino. I understand there are 4 pins in the ARM Processor for JTAG.

    1) Does JTAG work during operation of device (hence a debugging tool)?
    2) Can I simply connect the 4 JTAG pins to an adruino programmed to send and receive signal as accordance to the IEEE standard?
    3) Will I need to power the ARM Processor or is there a separate power source for the JTAG logic?

    Thanks to anyone reading this ;)