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Status LED

The multi-color LED on front side informs about the ULINKplus operation status. When connecting ULINKplus to USB the LED changes from Orange, to Red (400 ms), to Green (400 ms) and finally to Blue. This indicates a successful USB connection.

ULINKplus - Front

The following table describes the LED status colors:

LED Color Description
none ULINKplus firmware is not running -- not connected over USB or in DFU mode
Orange ULINKplus is connected but not yet enumerated or enumeration failed
Blue ULINKplus is connected and enumerated -- the debugger is not connected
Red The debugger is connected, and the target is stopped
Green The debugger is connected, and the target is running
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