ATMEGA48P-20AUR Atmel, ATMEGA48P-20AUR Datasheet - Page 413
![MCU AVR 4K FLASH 20MHZ 32TQFP](/photos/6/91/69154/313-32-tqfp_sml.jpg)
ATMEGA48P-20AUR
Manufacturer Part Number
ATMEGA48P-20AUR
Description
MCU AVR 4K FLASH 20MHZ 32TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA168P-20AU.pdf
(420 pages)
Specifications of ATMEGA48P-20AUR
Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
23
Program Memory Size
4KB (2K x 16)
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
512 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
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
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Table of Contents
8025L–AVR–7/10
1
2
3
4
5
6
7
8
Features ..................................................................................................... 1
Pin Configurations ................................................................................... 2
Overview ................................................................................................... 4
Resources ................................................................................................. 8
Data Retention .......................................................................................... 8
About Code Examples ............................................................................. 8
AVR CPU Core .......................................................................................... 9
AVR Memories ........................................................................................ 17
System Clock and Clock Options ......................................................... 27
1.1Pin Descriptions ........................................................................................................3
2.1Block Diagram ...........................................................................................................5
2.2Comparison Between ATmega48P, ATmega88P and ATmega168P .......................6
6.1Overview ...................................................................................................................9
6.2ALU – Arithmetic Logic Unit ....................................................................................10
6.3Status Register ........................................................................................................10
6.4General Purpose Register File ................................................................................12
6.5Stack Pointer ...........................................................................................................13
6.6Instruction Execution Timing ...................................................................................14
6.7Reset and Interrupt Handling ..................................................................................15
7.1Overview .................................................................................................................17
7.2In-System Reprogrammable Flash Program Memory .............................................17
7.3SRAM Data Memory ...............................................................................................19
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
8.3Low Power Crystal Oscillator ...................................................................................29
8.4Full Swing Crystal Oscillator ....................................................................................31
8.5Low Frequency Crystal Oscillator ............................................................................33
8.6Calibrated Internal RC Oscillator .............................................................................34
8.7128 kHz Internal Oscillator ......................................................................................35
ATmega48P/88P/168P
i
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