User manual

5.5 LEDs explained

There are two 3mm LEDs – ORANGE and a double colored GREEN/RED.

Green – when GREEN LED is on – USB connection is active

Green – GREEN LED on and RED blink – USB connection active and programming activity

(erasing, flashing, programming) – unless TARGET is on

Orange – when ORANGE LED is off – TARGET jumper is in position OFF

Orange – ORANGE LED on – TARGET jumper is in position on, BLINK means programming

activity (erasing, flashing, programming)

After a firmware change the LEDs might behave in a different way:

Orange – turns on during programmer initialization and after that turns off; flashes when target

operation is performed – read//write

Red – turns on after successful USB initialization

5.6 USB connector

The AVR-ISP-MK2 has a USB type B connector. It is used to establish a connection between a

personal computer and AVR-ISP-MK2.

The typical hardware setup is as follows:

PERSONAL COMPUTER ↔USB CABLE ↔ AVR-ISP-MK2 ↔[ADAPTER] ↔TARGET

If you encounter unstable irregular behavior of the programmer or if the powering from the

programmer to your target is unreliable, please follow the recommendations below:

• As with most USB devices please ensure that your cables are good enough. Low-cost low-

quality cables might have very high inner resistance, thus lowering the voltage that the unit

receives.

• Avoid using USB hubs and splitters.

• Avoid using USB 3.0 ports.

• Test with another USB port.

• Test with another computer.

Page 20 of 24