Datasheet

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Enter Title of Manual [DATASHEET]
8159E–AVR–02/2013
Table of Contents
Features ..................................................................................................... 1
1 Pin Configurations ...................................................................................2
2 Overview ................................................................................................... 3
2.1 Block Diagram ...................................................................................................3
2.2 Pin Descriptions .................................................................................................4
3 Resources ................................................................................................. 6
4 Data Retention .......................................................................................... 6
5 About Code Examples ............................................................................. 6
6 Capacitive touch sensing ........................................................................ 6
7 AVR CPU Core ..........................................................................................7
7.1 Overview ............................................................................................................7
7.2 Arithmetic Logic Unit – ALU ...............................................................................8
7.3 Status Register ..................................................................................................8
7.4 General Purpose Register File ..........................................................................9
7.5 Stack Pointer ...................................................................................................10
7.6 Instruction Execution Timing ...........................................................................11
7.7 Reset and Interrupt Handling ...........................................................................12
8 AVR Memories ........................................................................................15
8.1 Overview ..........................................................................................................15
8.2 In-System Reprogrammable Flash Program Memory .....................................15
8.3 SRAM Data Memory ........................................................................................16
8.4 EEPROM Data Memory ..................................................................................17
8.5 I/O Memory ......................................................................................................17
8.6 Register Description ........................................................................................18
9 System Clock and Clock Options ......................................................... 24
9.1 Clock Systems and their Distribution ...............................................................24
9.2 Clock Sources .................................................................................................25
9.3 Crystal Oscillator .............................................................................................25
9.4 Low-frequency Crystal Oscillator .....................................................................27
9.5 External RC Oscillator .....................................................................................27
9.6 Calibrated Internal RC Oscillator .....................................................................29
9.7 External Clock .................................................................................................30