The Atmel AVR JTAGICE mkII three LEDs which indicate the status of current debug or programming sessions.
| LED | Position | Description |
|---|---|---|
| Target power | 1 | GREEN when target board power is ON |
| JTAGICE mkII power | 2 |
RED when the JTAGICE mkII unit is powered. Flashing indicates that the USB hub has not allocated the required power allowance. |
| Status | 3 |
GREEN: Data transfer. Flashing green indicates target running. ORANGE: Firmware upgrade or initialization. RED: Idle, not connected. NONE: Idle, connected. |