ATXMEGA256A3U Datasheet, PDF (112/116 Pages) ATMEL Corporation – 8/16-bit Atmel XMEGA A3U Microcontroller

8386A–AVR–07/11
XMEGA A3U
10.3Clock Options ........................................................................................................19
11 Power Management and Sleep Modes ................................................. 21
11.1Features ................................................................................................................21
11.2Overview ...............................................................................................................21
11.3Sleep Modes .........................................................................................................21
12 System Control and Reset .................................................................... 23
12.1Features ................................................................................................................23
12.2Overview ...............................................................................................................23
12.3Reset Sources .......................................................................................................23
13 WDT - Watchdog Timer ......................................................................... 25
13.1Features ................................................................................................................25
13.2Overview ...............................................................................................................25
14 Interrupts and Programmable Multi-level Interrupt Controller .......... 26
14.1Features ................................................................................................................26
14.2Overview ...............................................................................................................26
14.3Interrupt vectors ....................................................................................................26
15 I/O Ports .................................................................................................. 28
15.1Features ................................................................................................................28
15.2Overview ...............................................................................................................28
15.3Output Driver .........................................................................................................29
15.4Input sensing .........................................................................................................31
15.5Alternate Port Functions ........................................................................................31
16 T/C - 16-bit Timer/Counter ..................................................................... 32
16.1Features ................................................................................................................32
16.2Overview ...............................................................................................................32
17 AWeX - Advanced Waveform Extension .............................................. 34
17.1Features ................................................................................................................34
17.2Overview ...............................................................................................................34
18 Hi-Res - High Resolution Extension ..................................................... 35
18.1Features ................................................................................................................35
18.2Overview ...............................................................................................................35
19 RTC - 16-bit Real-Time Counter ............................................................ 36
19.1Features ................................................................................................................36
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