atmega3250v-8auatmega325v-8ai ATMEL Corporation, atmega3250v-8auatmega325v-8ai Datasheet - Page 355

• Manufacturer Part Number: atmega3250v-8auatmega325v-8ai
• Description: Atmega3250 8-bit Microcontroller With In-system Programmable Flash
• Manufacturer: ATMEL Corporation

Table of Contents
1
2
3
4
5
6
7
8
9
2570L–AVR–08/07
Features ..................................................................................................... 1
Pin Configurations ................................................................................... 2
Disclaimer ................................................................................................. 3
Overview ................................................................................................... 3
Resources ................................................................................................. 8
Data Retention .......................................................................................... 8
About Code Examples ............................................................................. 8
AVR CPU Core .......................................................................................... 9
AVR Memories ........................................................................................ 17
System Clock and Clock Options ......................................................... 25
3.1
3.2
3.3
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
8.1
8.2
8.3
8.4
8.5
9.1
9.2
9.3
9.4
9.5
Block Diagram ...................................................................................................4
Comparison between ATmega325, ATmega3250, ATmega645 and ATmega6450 5
Pin Descriptions .................................................................................................5
Overview ............................................................................................................9
Architectural Overview .......................................................................................9
ALU – Arithmetic Logic Unit .............................................................................10
Status Register ................................................................................................11
General Purpose Register File ........................................................................12
Stack Pointer ...................................................................................................13
Instruction Execution Timing ...........................................................................13
Reset and Interrupt Handling ...........................................................................14
In-System Reprogrammable Flash Program Memory .....................................17
SRAM Data Memory ........................................................................................18
EEPROM Data Memory ..................................................................................19
I/O Memory ......................................................................................................20
Register Description ........................................................................................21
Clock Systems and their Distribution ...............................................................25
Clock Sources .................................................................................................26
Crystal Oscillator .............................................................................................27
Low-frequency Crystal Oscillator .....................................................................28
Calibrated Internal RC Oscillator .....................................................................28
ATmega325/3250/645/6450
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