Datasheet

i
8246B–AVR–09/11
ATtiny2313A/4313
Table of Contents
Features..................................................................................................... 1
1 Pin Configurations ................................................................................... 2
1.1 Pin Descriptions .................................................................................................3
2 Overview ................................................................................................... 5
2.1 Block Diagram ...................................................................................................5
2.2 Comparison Between ATtiny2313A and ATtiny4313 ........................................6
3 About ......................................................................................................... 7
3.1 Resources .........................................................................................................7
3.2 Code Examples .................................................................................................7
3.3 Data Retention ...................................................................................................7
4CPU Core .................................................................................................. 8
4.1 Architectural Overview .......................................................................................8
4.2 ALU – Arithmetic Logic Unit ...............................................................................9
4.3 Status Register ..................................................................................................9
4.4 General Purpose Register File ........................................................................10
4.5 Stack Pointer ...................................................................................................12
4.6 Instruction Execution Timing ...........................................................................12
4.7 Reset and Interrupt Handling ...........................................................................13
5 Memories ................................................................................................ 15
5.1 Program Memory (Flash) .................................................................................15
5.2 Data Memory (SRAM) and Register Files .......................................................16
5.3 Data Memory (EEPROM) ................................................................................17
5.4 Register Description ........................................................................................22
6 Clock System ......................................................................................... 25
6.1 Clock Subsystems ...........................................................................................25
6.2 Clock Sources .................................................................................................26
6.3 System Clock Prescaler ..................................................................................30
6.4 Clock Output Buffer .........................................................................................31
6.5 Register Description ........................................................................................31
7 Power Management and Sleep Modes ................................................. 33
7.1 Sleep Modes ....................................................................................................33
7.2 Software BOD Disable .....................................................................................34