4.6.1. Powering the interface unit using the power jack (Multi-ICE Version 2.1 or later)

From Version 2.1 onwards, the Multi-ICE interface hardware supplied with Multi-ICE includes:

The power jack accepts a 2.1mm plug with center positive polarity. You can use power supplies with output voltages from 9V to 12V DC and a minimum continuous power rating of 500mA.

Note

The voltage reference used by the interface unit JTAG circuit is generated from the VTref signal present on the JTAG connector. If this signal is not connected at the target, you must modify the target or the JTAG cable to supply a suitable reference. Typically, connecting VTref to Vsupply is sufficient.

To connect to a running target:

  1. Ensure that the Multi-ICE interface unit is not already powered from the target.

  2. The JTAG input lines TDI, TMS, nSRST, and nTRST must have pull-up resistors (normal practice) and TCK must have a pull-down resistor so that when the adaptor is not connected from the target these lines are in their quiescent state.

  3. Plug the power jack into the interface unit.

  4. Configure the Multi-ICE server. You must either manually configure the server or autoconfigure using a separate test system. Leave the server running.

    Note

    Do not use autoconfigure on the target that must be debugged. Doing so resets the processor.

  5. Plug the 20-way JTAG cable into the target.

  6. Start the debugger. The debugger can then stop the processor and display the stopped state.

    To get a high-level (source code) view of the problem, you must load the symbol table for your target program into the debugger. For AXD, use File ? Load debug symbols.... For ADW or ADU, use File ? Load symbols only....

  7. Press the Go or Run button and unplug the JTAG connector to restart the system. Then exit the debugger.

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