While launching the Universal Debug Engine (UDE), the connection to the target system cannot be established.

General mistakes:

• wrong interface cable used
• wrong UAD connector used

ASC bootstrap loader Monitor Interface:

• Possible Reasons for Communication Errors
  • power supply fails
  • ASC bootstrap loader mode in the target system not selected (if applicable)
  • target not in RESET/Bootstrap loader mode
  • wrong target configuration file used when launching UDE
  • no external RAM for the monitor available
  • no external RAM for the interrupt vector table available (0x0000 to 0x01FF)
  • selected baud rate overruns external hardware
• Additional Diagnosis:
  • Using the MiniMonitor Interface the diagnosis capabilities of the debugger are made available if external RAM access does not work at all.

ROM Monitor Interface:

• Possible Reasons for Communication Errors
  • power supply fails
  • bootstrap loader mode is selected
  • wrong target configuration file used when launching UDE
  • ROM content not correctly programmed
  • no external RAM in the monitor data area available
  • selected baud rate overruns external hardware