Document
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
1. Pin Configurations
Figure 1-1. Pinout ATmega3250/6450
ATmega325/3250/645/6450
AVCC AGND AREF PF0 (ADC0) PF1(ADC1) PF2 (ADC2) PF3 (ADC3) PF4 (ADC4/TCK) PF5 (ADC5/TMS) PF6 (ADC6/TDO) PF7 (ADC7/TDI) DNC DNC PH7 (PCINT23) PH6 (PCINT22) PH5 (PCINT21) PH4 (PCINT20) DNC DNC GND VCC DNC PA0 PA1 PA2
100
99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79.