15 Table of Contents
Features............................................................................................... 1
1 Introduction...................................................................................... 1
2 Abbreviations................................................................................... 2
3 References........................................................................................ 2
3.1 Device datasheet................................................................................................. 2
3.2 The AVR Software Framework............................................................................ 2
3.3 The AT32UC3C-EK Getting Started ................................................................... 2
3.4 USB DFU boot loader.......................................................................................... 2
4 Power circuit .................................................................................... 3
4.1 Single 3.3V power supply.................................................................................... 3
4.2 Single 5V power supply....................................................................................... 5
5 Reset circuit ..................................................................................... 7
6 Clocks and crystal oscillators ........................................................ 8
6.1 External clock source .......................................................................................... 8
6.2 Crystal oscillator.................................................................................................. 8
7 ADC Analog-to-digital converter .................................................... 9
7.1 ADC analog Input................................................................................................ 9
7.2 ADC voltage reference........................................................................................ 9
7.2.1 ADC single-ended external reference (ADCREF0/ADCREF1).................................. 9
7.2.2 ADC differential external reference pins (ADCVREFP/ADCVREFN) ...................... 10
8 Digital-to-analog converter ........................................................... 12
8.1 DAC connection................................................................................................. 12
9 USB connection ............................................................................. 13
9.1 Not used ............................................................................................................ 13
9.2 Device mode, bus-powered connection............................................................ 13
9.3 Device mode, self-powered connection ............................................................ 14
9.4 Host mode, powered from bus connection........................................................ 15
9.5 USB DFU ISP entry point.................................................................................. 15
10 Ethernet interface ........................................................................ 16
10.1 Ethernet interface in MII mode ........................................................................ 16
10.2 Ethernet interface in RMII mode...................................................................... 17
10.3 Ethernet Wake-on-LAN ................................................................................... 18
11 External bus interface ................................................................. 19
28
AVR32768
32157A-AVR-12/10
ATMEL [ ATMEL ]
