JTAG Chain Debugging tab

Allows you to debug your JTAG chain by running commands to step through the state of the JTAG TAP controller, or repeat the commands from a previous session of the tool.

To playback the debugging sequences from a previously saved session, use the following commands:

• Open JTAG Chain Log— Allows you to browse to, open, and run a saved JTAG Chain Debugger session log.
• Stop— Allows you to stop the running of the commands from the saved session log.

To manually shift in the JTAG sequences, use the following commands:

• Command— Allows you to run one of the following commands for debugging the JTAG chain:
• • Run test— Allows you to place the TAP controller in the specified state for a specified number of clocks.
  • Shift IR— Allows you to specify a scan pattern that you can apply to the target instruction registers.
  • Shift DR— Allows you to specify a scan pattern that you can apply to the target data registers.
  • Goto State— Allows you to move the TAP controller from one stable state to another for further testing.
• TAP state— Allows you to set the target state for the commands. The selected target state will be reflected.
• Clocks— Allows you specify the number of clocks to use when running a command.
• TDI— Allows you read the results of a scan in the TDI field.
• Run— Allows you to apply the selected Command and Option setting to the JTAG chain.