Datasheet

iii
AT32UC3A
17 External Interrupts Controller (EIC) . .................................................. 105
17.1Features . .............................................................................................................105
17.2Description . ..........................................................................................................105
17.3Block Diagram . ....................................................................................................106
17.4Product Dependencies . .......................................................................................106
17.5Functional Description . ........................................................................................107
17.6User Interface . .....................................................................................................109
18 Flash Controller (FLASHC) . ................................................................ 115
18.1Features . .............................................................................................................115
18.2Description . ..........................................................................................................115
18.3Product dependencies . ........................................................................................115
18.4Functional description . .........................................................................................116
18.5Flash commands . ................................................................................................118
18.6General-purpose fuse bits . ..................................................................................120
18.7Security bit . ..........................................................................................................122
18.8User interface . .....................................................................................................123
19 HSB Bus Matrix (HMATRIX) . .............................................................. 132
19.1Features . .............................................................................................................132
19.2Description . ..........................................................................................................132
19.3Memory Mapping . ................................................................................................132
19.4Special Bus Granting Mechanism . ......................................................................132
19.5Arbitration . ...........................................................................................................133
19.6Slave and Master assignation . ............................................................................135
19.7User Interface . .....................................................................................................136
20 External Bus Interface (EBI) . .............................................................. 145
20.1Features . .............................................................................................................145
20.2Description . ..........................................................................................................145
20.3Block Diagram . ....................................................................................................146
20.4I/O Lines Description . ..........................................................................................147
20.5Application Example . ...........................................................................................148
20.6Product Dependencies . .......................................................................................151
20.7Functional Description . ........................................................................................151
21 Peripheral DMA Controller (PDCA) . ................................................... 153
21.1Features . .............................................................................................................153
21.2Overview . .............................................................................................................153
32058K
AVR32-01/12