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
