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What is ATMEGA325?

This electronic component, produced by the manufacturer "ATMEL Corporation", performs the same function as "8-bit Microcontroller".


ATMEGA325 Datasheet PDF - ATMEL Corporation

Part Number ATMEGA325
Description 8-bit Microcontroller
Manufacturers ATMEL Corporation 
Logo ATMEL Corporation Logo 


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Features
High Performance, Low Power Atmel® AVR® 8-Bit Microcontroller
Advanced RISC Architecture
– 130 Powerful Instructions – Most Single Clock Cycle Execution
– 32 x 8 General Purpose Working Registers
– Fully Static Operation
– Up to 16MIPS Throughput at 16MHz
– On-Chip 2-cycle Multiplier
High Endurance Non-volatile Memory Segments
– In-System Self-programmable Flash Program Memory
• 32KBytes (ATmega325/ATmega3250)
• 64KBytes (ATmega645/ATmega6450)
– EEPROM
• 1Kbytes (ATmega325/ATmega3250)
• 2Kbytes (ATmega645/ATmega6450)
– Internal SRAM
• 2Kbytes (ATmega325/ATmega3250)
• 4Kbytes (ATmega645/ATmega6450)
– Write/Erase Cycles: 10,000 Flash/ 100,000 EEPROM
– Data retention: 20 years at 85°C/100 years at 25°C(1)
– Optional Boot Code Section with Independent Lock Bits
• In-System Programming by On-chip Boot Program
• True Read-While-Write Operation
– Programming Lock for Software Security
Atmel® QTouch® library support
– Capacitive touch buttons, sliders and wheels
– QTouch and QMatrix® acquisition
– Up to 64 sense channels
JTAG (IEEE std. 1149.1 compliant) Interface
– Boundary-scan Capabilities According to the JTAG Standard
– Extensive On-chip Debug Support
– Programming of Flash, EEPROM, Fuses, and Lock Bits through the JTAG Interface
Peripheral Features
– Two 8-bit Timer/Counters with Separate Prescaler and Compare Mode
– One 16-bit Timer/Counter with Separate Prescaler, Compare Mode, and Capture
Mode
– Real Time Counter with Separate Oscillator
– Four PWM Channels
– 8-channel, 10-bit ADC
– Programmable Serial USART
– Master/Slave SPI Serial Interface
– Universal Serial Interface with Start Condition Detector
– Programmable Watchdog Timer with Separate On-chip Oscillator
– On-chip Analog Comparator
– Interrupt and Wake-up on Pin Change
Special Microcontroller Features
– Power-on Reset and Programmable Brown-out Detection
– Internal Calibrated Oscillator
– External and Internal Interrupt Sources
– Five Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, and
Standby
I/O and Packages
– 53/68 Programmable I/O Lines
– 64-lead TQFP, 64-pad QFN/MLF, and 100-lead TQFP
Speed Grade:
– ATmega325V/ATmega3250V/ATmega645V/ATmega6450V:
• 0 - 4MHz @ 1.8 - 5.5V; 0 - 8MHz @ 2.7 - 5.5V
– Atmel ATmega325/3250/645/6450:
• 0 - 8MHz @ 2.7 - 5.5V; 0 - 16MHz @ 4.5 - 5.5V
Temperature range:
– -40°C to 85°C IndustrSial
Ultra-Low Power Consumption
– Active Mode:
1MHz, 1.8V: 350µA
32kHz, 1.8V: 20µA (including Oscillator)
– Power-down Mode:
100 nA at 1.8V
8-bit Atmel
Microcontroller
with In-System
Programmable
Flash
ATmega325/V
ATmega3250/V
ATmega645/V
ATmega6450/V
2570N–AVR–05/11

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ATMEGA325 equivalent
ATmega325/3250/645/6450
resulting architecture is more code efficient while achieving throughputs up to ten times faster
than conventional CISC microcontrollers.
The Atmel ATmega325/3250/645/6450 provides the following features: 32/64K bytes of In-Sys-
tem Programmable Flash with Read-While-Write capabilities, 1/2K bytes EEPROM, 2/4K byte
SRAM, 54/69 general purpose I/O lines, 32 general purpose working registers, a JTAG interface
for Boundary-scan, On-chip Debugging support and programming, three flexible Timer/Counters
with compare modes, internal and external interrupts, a serial programmable USART, Universal
Serial Interface with Start Condition Detector, an 8-channel, 10-bit ADC, a programmable
Watchdog Timer with internal Oscillator, an SPI serial port, and five software selectable power
saving modes. The Idle mode stops the CPU while allowing the SRAM, Timer/Counters, 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 will continue 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.
Atmel offers the QTouch® library for embedding capacitive touch buttons, sliders and wheels-
functionality into AVR microcontrollers. The patented charge-transfer signal acquisition
offersrobust sensing and includes fully debounced reporting of touch keys and includes Adjacent
KeySuppression® (AKS) technology for unambiguous detection of key events. The easy-to-use
QTouch Suite toolchain allows you to explore, develop and debug your own touch applications.
The device is manufactured using Atmel’s high density non-volatile memory technology. The
On-chip In-System re-Programmable (ISP) Flash allows the program memory to be repro-
grammed 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. Soft-
ware 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 Atmel ATmega325/3250/645/6450 is a
powerful microcontroller that provides a highly flexible and cost effective solution to many
embedded control applications.
The Atmel ATmega325/3250/645/6450 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.
2570N–AVR–05/11
5


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On this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for ATMEGA325 electronic component.


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