atmega323l ATMEL Corporation, atmega323l Datasheet - Page 243

• Manufacturer Part Number: atmega323l
• Description: Atmega323 8-bit Avr Microcontroller With 32k Bytes Of In-system Programmable Flash
• Manufacturer: ATMEL Corporation

Table of Contents
1457G–AVR–09/03
Features................................................................................................ 1
Pin Configurations............................................................................... 2
Overview ............................................................................................... 3
Clock Options ...................................................................................... 6
Architectural Overview........................................................................ 8
Calibrated Internal RC Oscillator ..................................................... 41
Timer/Counters .................................................................................. 43
Watchdog Timer................................................................................. 64
EEPROM Read/Write Access............................................................ 66
Serial Peripheral Interface – SPI....................................................... 69
USART ................................................................................................ 74
Block Diagram ...................................................................................................... 3
Pin Descriptions.................................................................................................... 4
Internal RC Oscillator............................................................................................ 6
Crystal Oscillator................................................................................................... 6
External Clock....................................................................................................... 7
External RC Oscillator .......................................................................................... 7
Timer Oscillator..................................................................................................... 7
The General Purpose Register File .................................................................... 11
The ALU – Arithmetic Logic Unit......................................................................... 12
The In-System Reprogrammable Flash Program Memory ................................. 12
The SRAM Data Memory.................................................................................... 12
The Program and Data Addressing Modes ........................................................ 13
The EEPROM Data Memory .............................................................................. 17
Memory Access Times and Instruction Execution Timing .................................. 17
I/O Memory ......................................................................................................... 18
Reset and Interrupt Handling.............................................................................. 22
Sleep Modes....................................................................................................... 39
Timer/Counter Prescalers................................................................................... 43
8-bit Timers/Counters Timer/Counter0 and Timer/Counter2 .............................. 45
16-bit Timer/Counter1......................................................................................... 54
Preventing EEPROM Corruption ........................................................................ 68
SS Pin Functionality............................................................................................ 70
Data Modes ........................................................................................................ 71
Overview............................................................................................................. 74
ATmega323 USART Pin Specification ............................................................... 75
ATmega323(L)
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