Pololu USB AVR Bedienungsanleitung PDF herunterladen (Seite 4)

1.a. Module Pinout and Components

Pololu USB AVR programmer, labeled top view.

The Pololu USB AVR programmer connects to a computer’s USB port via an included USB A to mini-B cable

[http://www.pololu.com/product/1129], and it connects to the target device via an included 6-pin ISP programming cable

[http://www.pololu.com/product/972] (the older, 10-pin ISP connections are not directly supported, but it is easy to create

or purchase a 6-pin-to-10-pin ISP adapter).

The USB AVR programmer has three indicator LEDs:

• The green LED indicates the USB status of the device. When you connect the programmer to the computer

via the USB cable, the green LED will start blinking slowly. The blinking continues until it receives a particular

message from the computer indicating that the drivers are installed correctly. After the programmer gets this

message, the green LED will be on, but it will flicker briefly when there is USB activity.

• The yellow LED indicates that the programmer is doing something. When it is blinking, it means that the

programmer has detected the target device (the voltage on the target VDD line is high). When it is on solid, it

means that the SLO-scope is enabled, and lines A and B are used for the SLO-scope instead of the USB-to-TTL-

serial adapter.

• The red LED indicates an error or warning. When it is blinking, it means that the target device is not detected

(the voltage on the target VDD line is low). When it is on solid, it means that the last attempt at programming

resulted in an error. You can determine the source of the error by running the configuration utility (see Section

3.e).

The VBUS line provides direct access to the 5V VBUS line on the USB cable and can be used to power additional

devices. The line can provide up to 100 mA, so the current draw of your programmer plus any additional devices

should not exceed this amount. If you attempt to draw more than this limit, your computer might disconnect the USB

port temporarily or take other actions to limit the use of USB power.

1. Overview Page 4 of 54

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Pololu USB AVR Bedienungsanleitung Seite 4