Datasheet

105
32059L–AVR32–01/2012
AT32UC3B
Table of Contents
1 Description ............................................................................................... 3
2 Overview ................................................................................................... 4
2.1 Blockdiagram .....................................................................................................4
3 Configuration Summary .......................................................................... 5
4 Package and Pinout ................................................................................. 6
4.1 Package .............................................................................................................6
4.2 Peripheral Multiplexing on I/O lines ...................................................................7
4.3 High Drive Current GPIO .................................................................................10
5 Signals Description ............................................................................... 10
5.1 JTAG pins ........................................................................................................13
5.2 RESET_N pin ..................................................................................................14
5.3 TWI pins ..........................................................................................................14
5.4 GPIO pins ........................................................................................................14
5.5 High drive pins .................................................................................................14
5.6 Power Considerations .....................................................................................14
6 Processor and Architecture .................................................................. 17
6.1 Features ..........................................................................................................17
6.2 AVR32 Architecture .........................................................................................17
6.3 The AVR32UC CPU ........................................................................................18
6.4 Programming Model ........................................................................................22
6.5 Exceptions and Interrupts ................................................................................26
6.6 Module Configuration ......................................................................................30
7 Memories ................................................................................................ 31
7.1 Embedded Memories ......................................................................................31
7.2 Physical Memory Map .....................................................................................31
7.3 Peripheral Address Map ..................................................................................32
7.4 CPU Local Bus Mapping .................................................................................33
8 Boot Sequence ....................................................................................... 34
8.1 Starting of clocks .............................................................................................34
8.2 Fetching of initial instructions ..........................................................................34
9 Electrical Characteristics ...................................................................... 35
9.1 Absolute Maximum Ratings* ...........................................................................35