Rainbow-electronics ATmega162V Instrukcja Użytkownika Pobierz pdf (Strona 317)

ATmega162/V

2513E–AVR–09/03

Table of Contents Features................................................................................................ 1

Pin Configurations............................................................................... 2

Disclaimer............................................................................................................. 2

Overview............................................................................................... 3

Block Diagram ...................................................................................................... 3

ATmega161 and ATmega162 Compatibility......................................................... 4

Pin Descriptions.................................................................................................... 5

About Code Examples.......................................................................................... 6

AVR CPU Core ..................................................................................... 7

Introduction........................................................................................................... 7

Architectural Overview.......................................................................................... 7

ALU – Arithmetic Logic Unit.................................................................................. 8

Status Register ..................................................................................................... 8

General Purpose Register File ........................................................................... 10

Stack Pointer ...................................................................................................... 11

Instruction Execution Timing............................................................................... 12

Reset and Interrupt Handling.............................................................................. 12

AVR ATmega162 Memories .............................................................. 15

In-System Reprogrammable Flash Program Memory ........................................ 15

SRAM Data Memory........................................................................................... 16

EEPROM Data Memory...................................................................................... 18

I/O Memory......................................................................................................... 23

External Memory Interface.................................................................................. 24

XMEM Register Description................................................................................ 28

System Clock and Clock Options .................................................... 33

Clock Systems and their Distribution.................................................................. 33

Clock Sources..................................................................................................... 34

Default Clock Source .......................................................................................... 34

Crystal Oscillator................................................................................................. 34

Low-frequency Crystal Oscillator........................................................................ 36

Calibrated Internal RC Oscillator ........................................................................ 36

External Clock..................................................................................................... 38

Clock output buffer.............................................................................................. 38

Timer/Counter Oscillator..................................................................................... 39

System Clock Prescaler...................................................................................... 39

Power Management and Sleep Modes............................................. 41

Idle Mode............................................................................................................ 42

Power-down Mode.............................................................................................. 42

Power-save Mode............................................................................................... 43

Standby Mode..................................................................................................... 43

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Rainbow-electronics ATmega162V Instrukcja Użytkownika Strona 317