ATMEGA329P-20MN Atmel, ATMEGA329P-20MN Datasheet - Page 420
![IC MCU AVR 32K 20MHZ 64QFN](/photos/12/13/121326/313-64-qfn_sml.jpg)
ATMEGA329P-20MN
Manufacturer Part Number
ATMEGA329P-20MN
Description
IC MCU AVR 32K 20MHZ 64QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA329P-20MN
Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Connectivity
SPI, UART/USART, USI
Peripherals
Brown-out Detect/Reset, LCD, POR, PWM, WDT
Number Of I /o
54
Program Memory Size
32KB (16K x 16)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-MLF®, 64-QFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Table of Contents
8021G–AVR–03/11
1
2
3
4
5
6
7
8
Features ..................................................................................................... 1
Pin Configurations ................................................................................... 2
Overview ................................................................................................... 4
Resources ................................................................................................. 9
Data Retention .......................................................................................... 9
About Code Examples ............................................................................. 9
AVR CPU Core ........................................................................................ 10
AVR Memories ........................................................................................ 18
System Clock and Clock Options ......................................................... 27
2.1Block Diagram ...........................................................................................................4
2.2Comparison between ATmega329P, and ATmega3290P. ........................................5
2.3Pin Descriptions ........................................................................................................6
6.1Overview .................................................................................................................10
6.2Architectural Overview ............................................................................................10
6.3ALU – Arithmetic Logic Unit ....................................................................................11
6.4AVR Status Register ...............................................................................................11
6.5General Purpose Register File ................................................................................13
6.6Stack Pointer ...........................................................................................................14
6.7Instruction Execution Timing ...................................................................................15
6.8Reset and Interrupt Handling ..................................................................................16
7.1Overview .................................................................................................................18
7.2In-System Reprogrammable Flash Program Memory .............................................18
7.3SRAM Data Memory ...............................................................................................18
7.4EEPROM Data Memory ..........................................................................................20
7.5I/O Memory ..............................................................................................................21
7.6Register Description ................................................................................................22
8.1Clock Systems and their Distribution .......................................................................27
8.2Clock Sources .........................................................................................................28
8.3Default Clock Source ...............................................................................................28
8.4Crystal Oscillator .....................................................................................................29
8.5Low-frequency Crystal Oscillator .............................................................................30
8.6Calibrated Internal RC Oscillator .............................................................................31
ATmega329P/3290P
i
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