ATMEGA3250-16AU

The Atmel ATmega325/3250/645/6450 is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the Atmel ATmega325/3250/645/6450 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed. The Atmel 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 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. 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 offers robust sensing and includes fully debounced reporting of touch keys and includes Adjacent Key Suppression 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.

Key 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℃/100 years at 25℃ 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℃ to 85℃
• Ultra-Low Power Consumption – Active Mode: 1MHz, 1.8V: 350μA 32kHz, 1.8V: 20μA (including Oscillator) – Power-down Mode: 100 nA at 1.8V