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AT90USBKey
.............................................................................................
Hardware User Guide
Section 1
Introduction ........................................................................................... 1-3
1.1
1.2
Overview ...................................................................................................1-3
AT90USBKey Features............................................................................1-4
Section 2
Using the AT90USBKey ....................................................................... 2-5
2.1
2.2
2.3
2.4
2.5
2.6
Overview ...................................................................................................2-5
Power Supply ............................................................................................2-6
Reset.........................................................................................................2-8
On-board Resources.................................................................................2-9
In-System Programming .........................................................................2-13
Debugging...............................................................................................2-14
Section 3
Troubleshooting Guide ....................................................................... 3-15
Section 4
Technical Specifications ..................................................................... 4-16
Section 5
Technical Support ............................................................................... 5-17
Section 6
Complete Schematics ......................................................................... 6-18
AT90USBKey Hardware User Guide User Guide
1
7627A–AVR–04/06
Section 1
Introduction
Congratulations on acquiring the AVR® AT90USBKey. This kit is designed to give
designers a quick start to develop code on the AVR® and for prototyping and testing of
new designs with the AT90USB microcontroller family.
1.1
Overview
This document describes the AT90USBKey dedicated to the AT90USB AVR
microcontroller. This board is designed to allow an easy evaluation of the product using
demonstration software.
To increase its demonstrative capabilities, this stand alone board has numerous onboard resources: USB, joystick, data-flash and temperature sensor.
Figure 1-1 . AT90USBKey
AT90USBKey Hardware User Guide
1-3
7627A–AVR–04/06
Introduction
1.2
AT90USBKey Features
The AT90USBKey provides the following features:
AT90USB QFN64
AVR Studio® software interface (1)
USB software interface for Device Firmware Upgrade (DFU bootloader) (2)
Power supply flagged by “VCC-ON” LED:
– regulated 3.3V
– from an external battery connector (for reduced host or OTG operation)
– from the USB interface (USB device bus powered application)
JTAG interface (connector not mounted):
– for on-chip ISP
– for on-chip debugging using JTAG ICE
Serial interfaces:
– 1 USB full/low speed device/host/OTG interface
On-board
(…)
… interface for Device Firmware Upgrade (DFU bootloader) (2)
Power supply flagged by “VCC-ON” LED:
– regulated 3.3V
– from an external battery connector (for reduced host or OTG operation)
– from the USB interface (USB device bus powered application)
JTAG interface (connector not mounted):
– for on-chip ISP
– for on-chip debugging using JTAG ICE
Serial interfaces:
– 1 USB full/low speed device/host/OTG…
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