Datasheet

i
AT32UC3A
Table of Contents
1 Description . ............................................................................................. 3
2 Configuration Summary . ........................................................................ 4
3 Abbreviations . ......................................................................................... 4
4 Blockdiagram . ......................................................................................... 5
4.1Processor and architecture . .......................................................................................6
5 Signals Description . ................................................................................ 8
6 Power Considerations . ......................................................................... 13
6.1Power Supplies . .......................................................................................................13
6.2Voltage Regulator . ...................................................................................................14
6.3Analog-to-Digital Converter (A.D.C) reference. . ......................................................15
7 Package and Pinout . ............................................................................. 16
8 I/O Line Considerations . ....................................................................... 20
8.1JTAG pins .................................................................................................................20
8.2RESET_N pin . .........................................................................................................20
8.3TWI pins . .................................................................................................................20
8.4GPIO pins . ...............................................................................................................20
9 Processor and Architecture . ................................................................ 21
9.1AVR32 Architecture . ................................................................................................21
9.2The AVR32UC CPU . ...............................................................................................21
9.3Programming Model . ...............................................................................................25
9.4Exceptions and Interrupts . .......................................................................................29
10 Memories . .............................................................................................. 33
10.1Embedded Memories . ...........................................................................................33
10.2Physical Memory Map . ..........................................................................................33
10.3Bus Matrix Connections . ........................................................................................34
11 Fuses Settings . ...................................................................................... 36
11.1Flash General Purpose Fuse Register (FGPFRLO) . .............................................36
11.2Default Fuse Value . ...............................................................................................37
12 Peripherals . ............................................................................................ 38
12.1Peripheral address map . .......................................................................................38
12.2CPU Local Bus Mapping . ......................................................................................39
32058K
AVR32-01/12