EDBG

LED Control

The EDBG controls two LEDs; the power LED and the status LED. The power LED is on by default when the kit is powered, but can be disabled by the EDBG to lower the power consumption of the kit. The status LED is turned on when a host computer opens a connection to the USB interface. During communication activity the status LED will flash.

If the EDBG enters bootloader mode, both the status LED and the power LED will flash simultaneously. When a firmware upgrade is in progress the LEDs will blink alternately.

The behavior of the EDBG LEDs is summarized in the table below.
Table 1. EDBG LED Control
Operation mode Power LED Status LED
Normal operation Power LED is lit when power is applied to the board. Activity indicator, LED flashes every time something happens on the EDBG.
Bootloader mode (idle) The power LED and the status LED blinks simultaneously.
Bootloader mode (firmware upgrade) The power LED and the status LED blinks in an alternating pattern.