Overview
ATtiny828 is a low-power CMOS 8-bit microcontrollers based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATtiny828 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.
   
Features
• High Performance, Low Power Atmel® AVR® 8-bit Microcontroller
• Advanced RISC Architecture
    • 123 Powerful Instructions – Most Single Clock Cycle Execution
    • 32 x 8 General Purpose Working Registers
    • Fully Static Operation
    • Up to 20 MIPS Throughput at 20 MHz
• Non-volatile Program and Data Memories
    • 8K Bytes of In-System Programmable Flash Program Memory
        • Endurance: 10,000 Write/Erase Cycles
    • 256 Bytes of In-System Programmable EEPROM
        • Endurance: 100,000 Write/Erase Cycles
    • 512 Bytes Internal SRAM
    • Optional Boot Code Section with Independent Lock Bits
    • Data Retention: 20 Years at 85oC / 100 Years at 25oC
• Peripheral Features
    • One 8-bit and one 16-bit Timer/Counter with Two PWM Channels, Each
    • Programmable Ultra Low Power Watchdog Timer
    • On-chip Analog Comparator
    • 10-bit Analog to Digital Converter
        • 28 External and 4 Internal, Single-ended Input Channels
    • Full Duplex USART with Start Frame Detection
    • Master/Slave SPI Serial Interface
    • Slave I2C Serial Interface
• Special Microcontroller Features
    • Low Power Idle, ADC Noise Reduction, and Power-down Modes
    • Enhanced Power-on Reset Circuit
    • Programmable Brown-out Detection Circuit with Supply Voltage Sampling
    • External and Internal Interrupt Sources
        • Pin Change Interrupt on 28 Pins
    • Calibrated 8MHz Oscillator with Temperature Calibration Option
    • Calibrated 32kHz Ultra Low Power Oscillator
    • High-Current Drive Capability on 8 I/O Pins
• I/O and Packages
    • 32-lead TQFP, and 32-pad QFN/MLF: 28 Programmable I/O Lines
• Speed Grade
    • 0 – 2 MHz @ 1.7 – 1.8V
    • 0 – 4 MHz @ 1.8 – 5.5V
    • 0 – 10 MHz @ 2.7 – 5.5V
    • 0 – 20 MHz @ 4.5 – 5.5V
• Low Power Consumption
    • Active Mode: 0.2 mA at 1.8V and 1MHz
    • Idle Mode: 30 µA at 1.8V and 1MHz
    • Power-Down Mode (WDT Enabled): 1 µA at 1.8V
    • Power-Down Mode (WDT Disabled): 100 nA at 1.8V