Datasheet

ii
8116J–AVR–06/2013
XMEGA A3B
Not recommended for new designs -
Use ATxmega256A3BU
10.2Overview ...............................................................................................................17
10.3Clock Options ........................................................................................................18
11 Power Management and Sleep Modes ................................................. 20
11.1Features ................................................................................................................20
11.2Overview ...............................................................................................................20
11.3Sleep Modes .........................................................................................................20
12 System Control and Reset .................................................................... 22
12.1Features ................................................................................................................22
12.2Resetting the AVR .................................................................................................22
12.3Reset Sources .......................................................................................................22
12.4WDT - Watchdog Timer .........................................................................................23
13 Battery Backup System ......................................................................... 24
13.1Features ................................................................................................................24
13.2Overview ...............................................................................................................24
14 PMIC - 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
15.3I/O configuration ....................................................................................................28
15.4Input sensing .........................................................................................................31
15.5Port Interrupt .........................................................................................................31
15.6Alternate Port Functions ........................................................................................31
16 T/C - 16-bit Timer/Counter with PWM ................................................... 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