xmega a3u - Elfa

8.1 Features ..........................................................................................................17
8.2 Overview ..........................................................................................................17
9 Event System ......................................................................................... 18
9.1 Features ..........................................................................................................18
9.2 Overview ..........................................................................................................18
10 System Clock and Clock options ......................................................... 20
10.1 Features ..........................................................................................................20
10.2 Overview ..........................................................................................................20
10.3 Clock Sources .................................................................................................21
11 Power Management and Sleep Modes ................................................. 23
11.1 Features ..........................................................................................................23
11.2 Overview ..........................................................................................................23
11.3 Sleep Modes ....................................................................................................23
12 System Control and Reset .................................................................... 25
12.1 Features ..........................................................................................................25
12.2 Overview ..........................................................................................................25
12.3 Reset Sequence ..............................................................................................25
12.4 Reset Sources .................................................................................................26
13 WDT – Watchdog Timer ......................................................................... 27
13.1 Features ..........................................................................................................27
13.2 Overview ..........................................................................................................27
14 Interrupts and Programmable Multilevel Interrupt Controller ........... 28
14.1 Features ..........................................................................................................28
14.2 Overview ..........................................................................................................28
14.3 Interrupt vectors ...............................................................................................28
15 I/O Ports .................................................................................................. 30
15.1 Features ..........................................................................................................30
15.2 Overview ..........................................................................................................30
15.3 Output Driver ...................................................................................................31
15.4 Input sensing ...................................................................................................33
15.5 Alternate Port Functions ..................................................................................33
16 TC0/1 – 16-bit Timer/Counter Type 0 and 1 ......................................... 34
16.1 Features ..........................................................................................................34
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XMEGA A3U
8386B–AVR–12/11