Datasheet

Table of Contents
Introduction......................................................................................................................1
Features.......................................................................................................................... 1
1. Description.................................................................................................................9
2. Configuration Summary...........................................................................................10
3. Ordering Information................................................................................................ 11
4. Block Diagram......................................................................................................... 12
5. Pin Configurations................................................................................................... 13
5.1. V
CC
............................................................................................................................................. 14
5.2. GND............................................................................................................................................14
5.3. PortA (PA7:PA0).........................................................................................................................14
5.4. Port B (PB7:PB0)........................................................................................................................15
5.5. Port C (PC7:PC0).......................................................................................................................15
5.6. Port D (PD7:PD0).......................................................................................................................15
5.7. RESET........................................................................................................................................15
5.8. XTAL1.........................................................................................................................................16
5.9. XTAL2.........................................................................................................................................16
5.10. AV
CC
........................................................................................................................................... 16
5.11. AREF..........................................................................................................................................16
6. Resources................................................................................................................17
7. Data Retention.........................................................................................................18
8. About Code Examples.............................................................................................19
9. Capacitive Touch Sensing....................................................................................... 20
10. AVR CPU Core........................................................................................................ 21
10.1. Overview.....................................................................................................................................21
10.2. ALU – Arithmetic Logic Unit........................................................................................................22
10.3. Status Register...........................................................................................................................22
10.4. General Purpose Register File................................................................................................... 24
10.5. Stack Pointer.............................................................................................................................. 25
10.6. Instruction Execution Timing...................................................................................................... 26
10.7. Reset and Interrupt Handling..................................................................................................... 27
11. AVR Memories.........................................................................................................29
11.1. Overview.....................................................................................................................................29
11.2. In-System Reprogrammable Flash Program Memory................................................................29
11.3. SRAM Data Memory...................................................................................................................30
11.4. EEPROM Data Memory............................................................................................................. 31