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ATMEGA328P Datasheet(PDF) 7 Page - ATMEL Corporation

No. de pieza ATMEGA328P
Descripción Electrónicos  8-bit AVR Microcontroller with 32K Bytes In-System Programmable Flash
Download  294 Pages
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Fabricante Electrónico  ATMEL [ATMEL Corporation]
Página de inicio  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATMEGA328P Datasheet(HTML) 7 Page - ATMEL Corporation

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ATmega328P [DATASHEET]
7810D–AVR–01/15
The AVR® core combines a rich instruction set with 32 general purpose working registers. All the 32 registers are directly
connected to the arithmetic logic unit (ALU), allowing two independent registers to be accessed in one single instruction
executed in one clock cycle. The resulting architecture is more code efficient while achieving throughputs up to ten times
faster than conventional CISC microcontrollers.
The Atmel® ATmega328P provides the following features: 32K bytes of in-system programmable flash with read-while-write
capabilities, 1K bytes EEPROM, 2K bytes SRAM, 23 general purpose I/O lines, 32 general purpose working registers, three
flexible Timer/Counters with compare modes, internal and external interrupts, a serial programmable USART, a byte-
oriented 2-wire serial interface, an SPI serial port, a 6-channel 10-bit ADC (8 channels in TQFP and QFN/MLF packages), a
programmable watchdog timer with internal oscillator, and five software selectable power saving modes. The idle mode
stops the CPU while allowing the SRAM, Timer/Counters, USART, 2-wire serial interface, SPI port, and interrupt system to
continue functioning. The power-down mode saves the register contents but freezes the oscillator, disabling all other chip
functions until the next interrupt or hardware reset. In power-save mode, the asynchronous timer continues to run, allowing
the user to maintain a timer base while the rest of the device is sleeping. The ADC noise reduction mode stops the CPU and
all I/O modules except asynchronous timer and ADC, to minimize switching noise during ADC conversions. In standby
mode, the crystal/resonator oscillator is running while the rest of the device is sleeping. This allows very fast start-up
combined with low power consumption.
The device is manufactured using Atmel high density non-volatile memory technology. The on-chip ISP flash allows the
program memory to be reprogrammed in-system through an SPI serial interface, by a conventional non-volatile memory
programmer, or by an on-chip boot program running on the AVR core. The boot program can use any interface to download
the application program in the application flash memory. Software in the boot flash section will continue to run while the
application flash section is updated, providing true read-while-write operation. By combining an 8-bit RISC CPU with
in-system self-programmable flash on a monolithic chip, the Atmel ATmega328P is a powerful microcontroller that provides
a highly flexible and cost effective solution to many embedded control applications.
The ATmega328P AVR is supported with a full suite of program and system development tools including: C compilers,
macro assemblers, program debugger/simulators, in-circuit emulators, and evaluation kits.


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