2.2.4. Hot plugging and unplugging the JTAG cable

You can plug and unplug the JTAG cable without affecting the target. This is because the RealView ICE run control unit includes power conditioning and switching circuitry.

You might want to do this if you have a target that is operating without a RealView ICE run control unit connected and you want to examine the target to find out why it is behaving in a particular way. To do this, you must power up the RealView ICE run control unit and configure the connection without disturbing the state of the target. This requires that the RealView ICE run control unit is powered before it is connected to the target.

When unplugging the JTAG connector, you must be aware of the following:

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