Datasheet

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8116J–AVR–06/2013
XMEGA A3B
Not recommended for new designs -
Use ATxmega256A3BU
Table of Contents
Features..................................................................................................... 1
Typical Applications ................................................................................ 1
1 Ordering Information ............................................................................... 2
2 Pinout/Block Diagram .............................................................................. 3
3 Overview ................................................................................................... 4
3.1Block Diagram ...........................................................................................................5
4 Resources ................................................................................................. 6
4.1Recommended reading .............................................................................................6
5 Disclaimer ................................................................................................. 6
6 AVR CPU ................................................................................................... 7
6.1Features ....................................................................................................................7
6.2Overview ...................................................................................................................7
6.3Register File ..............................................................................................................8
6.4ALU - Arithmetic Logic Unit .......................................................................................8
6.5Program Flow ............................................................................................................8
7 Memories .................................................................................................. 9
7.1Features ....................................................................................................................9
7.2Overview ...................................................................................................................9
7.3In-System Programmable Flash Program Memory .................................................10
7.4Data Memory ...........................................................................................................10
7.5Production Signature Row .......................................................................................12
7.6User Signature Row ................................................................................................12
7.7Flash and EEPROM Page Size ...............................................................................13
8 DMAC - Direct Memory Access Controller .......................................... 14
8.1Features ..................................................................................................................14
8.2Overview .................................................................................................................14
9 Event System ......................................................................................... 15
9.1Features ..................................................................................................................15
9.2Overview .................................................................................................................15
10 System Clock and Clock options ......................................................... 17
10.1Features ................................................................................................................17