ATXMEGA128A4_1012 Datasheet, PDF (104/108 Pages) ATMEL Corporation – 8/16-bit XMEGA A4 Microcontroller

10.2Overview ...............................................................................................................18
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
12.2Resetting the AVR .................................................................................................23
12.3Reset Sources .......................................................................................................23
13 WDT - Watchdog Timer ......................................................................... 24
13.1Features ................................................................................................................24
13.2Overview ...............................................................................................................24
14 PMIC - Programmable Multi-level Interrupt Controller ....................... 25
14.1Features ................................................................................................................25
14.2Overview ...............................................................................................................25
14.3Interrupt vectors ....................................................................................................25
15 I/O Ports .................................................................................................. 27
15.1Features ................................................................................................................27
15.2Overview ...............................................................................................................27
15.3I/O configuration ....................................................................................................27
15.4Input sensing .........................................................................................................30
15.5Port Interrupt .........................................................................................................30
15.6Alternate Port Functions ........................................................................................30
16 T/C - 16-bit Timer/Counter ..................................................................... 31
16.1Features ................................................................................................................31
16.2Overview ...............................................................................................................31
17 AWEX - Advanced Waveform Extension ............................................. 33
17.1Features ................................................................................................................33
17.2Overview ...............................................................................................................33
18 Hi-Res - High Resolution Extension ..................................................... 34
18.1Features ................................................................................................................34
18.2Overview ...............................................................................................................34
ii XMEGA A4
8069Q–AVR–12/10