ATMEGA325 Datasheet PDF

●The ATmega325/3250/645/6450 provides the following features: 32/64K bytes of In-System 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.

●Features

●• High Performance, Low Power 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 16 MIPS Throughput at 16 MHz

●– On-Chip 2-cycle Multiplier

●• High Endurance Non-volatile Memory Segments

●– In-System Self-programmable Flash Program Memory

●• 32K Bytes (ATmega325/ATmega3250)

●• 64K Bytes (ATmega645/ATmega6450)

●– EEPROM

●• 1K bytes (ATmega325/ATmega3250)

●• 2K bytes (ATmega645/ATmega6450)

●– Internal SRAM

●• 2K bytes (ATmega325/ATmega3250)

●• 4K bytes (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

●• 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 withSeparate 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 - 4 MHz @ 1.8 - 5.5V, 0 - 8 MHz @ 2.7 - 5.5V

●– ATmega325/3250/645/6450:

●• 0 - 8 MHz @ 2.7 - 5.5V, 0 - 16 MHz @ 4.5 - 5.5V

●• Temperature range:

●– -40°C to 85°C Industrial

●• Ultra-Low Power Consumption

●– Active Mode:

●  1 MHz, 1.8V: 350 µA

●  32 kHz, 1.8V: 20 µA (including Oscillator)

●– Power-down Mode: 100 nA at 1.8V