A. module pinout and components – Pololu USB AVR User Manual
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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
, and it connects to the target device via an included
(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
).
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.
Pololu USB AVR Programmer User's Guide
© 2001–2014 Pololu Corporation
1. Overview
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