Overview
The ATmega165 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 ATmega165 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.
   
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
• Non-volatile Program and Data Memories
    – 16K bytes of In-System Self-Programmable Flash
        Endurance: 10,000 Write/Erase Cycles
    – Optional Boot Code Section with Independent Lock Bits
        In-System Programming by On-chip Boot Program
        True Read-While-Write Operation
    – 512 bytes EEPROM
        Endurance: 100,000 Write/Erase Cycles
    – 1K byte Internal SRAM
    – 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 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, Po°wer-down, and
        Standby
• I/O and Packages
    – 53 Programmable I/O Lines2573GS
    – 64-lead TQFP and 64-pad QFN/MLF
• Speed Grade:
    – ATmega165V: 0 - 4 MHz @ 1.8 - 5.5V, 0 - 8 MHz @ 2.7 - 5.5V
    – ATmega165: 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: 350µA
        32 kHz, 1.8V: 20µA (including Oscillator)
    – Power-down Mode:
        0.1µA at 1.8V