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• High-Performance RISC CPU:
• Only 33 Single-Word Instructions to Learn
• All Single-Cycle Instructions Except for Program Branches, which are Two-Cycle
• 12-Bit Wide Instructions
• 2-Level Deep Hardware Stack
• Direct, Indirect and Relative Addressing modes for Data and Instructions
• 8-Bit Wide Data Path
• 8 Special Function Hardware Registers
• Operating Speed:

Fetures

• 28-pin AVR Microcontroller
• Flash Program Memory: 8 kbytes
• EEPROM Data Memory: 512 bytes
• SRAM Data Memory: 1 kbytes
• I/O Pins: 23
• Timers: Two 8-bit / One 16-bit
• A/D Converter: 10-bit Six Channel
• PWM: Three Channels
• RTC: Yes with Separate Oscillator
• MSSP: SPI and I²C Master and Slave Support
• USART: Yes
• External Oscillator: up to 8MHz

• High Performance, Low Power AVR® 8-Bit Microcontroller
• Advanced RISC Architecture
• 131 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
• On-chip 2-cycle Multiplier
• • High Endurance Non-volatile Memory Segments – 4K Bytes of In-System Self-Programmable Flash progam memory

• Special Microcontroller Features
• 100,000 erase/write cycle Enhanced Flash Program Memory Typical
• Self-reprogrammable under software control
• Single-supply 5V In-Circuit Serial Programming
• Watchdog Timer (WDT) with its own on-chip RC oscillator
• Programmable Code Protection
• Power-Saving Sleeping Mode
•  Peripheral Features
• Two 8-bit (TMR0, TMR2)timer/counter with Prescalar
• One 16-bit timer/counter
• Brown-out detection circuitry
• Parallel Slave Port (PSP): 40/44 pin-device only
•  High-Performance RISC CPU
•  Only 35 single-word instructions to learn
•  DC-20MHz clock input
•  Up to 8K x 14 words of Flash Program Memory
•  Pinout Compatible to other 28-pin or 40/44-pin
•  Analog Features
• 10-bit, up to 8-channel Analog-to-Digital Converter (A/D)
• Brown-out Reset(BOR)
• Two Analog Comparators
• Programmable on-chip voltage reference (VREF) module
•  CMOS Technology
• Low-power, high-speed Flash/EEPROM technology
• Fully Static Design
• Wide Operating Voltage Range (2.0V to 5.5V)
• Low-power Consumption

• Special Microcontroller Features
• Fail-Safe Clock Monitor
• Power-On Reset
• Power-up Timer (PWRT) and Oscillator Start-Up Timer (OST)
• Two-Speed Start-Up mode
• Programmable Code Protection
• Power-Saving Sleeping Mode
•  Peripheral Features
• Two 8-bit timer/counter with Prescalar
• One 16-bit timer/counter
• High source/sink current: 25mA
• Master Synchroonous Serial Port (MSSP)
• Parallel Slave Port (PSP): 40/44 pin-device only
•  Low-Power Features
• Primary Run(XT, RC, Oscillator, 76 µA, 1MHz, 2V)
• RC_RUN (7µA, 31.25kHz, 2V)
• Timer1 Oscillator (1.8 µA, 32kHz, 2V)
• Wachtdog Timer(0.7 µA, 2V)
• Two-Speed Oscillator Start-up
•  Analog Features
• 10-bit, up to 14-channel Analog-to-Digital Converter
• Dual Analog Comparators
• Programmable Low-Current Brown-out Reset (NOR) Circuitry
• Programmable Low-Voltage Detect (LVD)
•  Oscillators
• Three Crystal modes: LP, XT, HS (up to 20 MHz)
• Two External RC modes
• ECIO (up to 20 MHz)
• 8 user-selectable frequencies

• High performance, low power Atmel® AVR® 8-bit microcontroller
• Advanced RISC architecture
• 131 powerful instructions – most single clock cycle execution
• 32 × 8 general purpose working registers
• Fully static operation
• Up to 20 MIPS throughput at 20MHz
• On-chip 2-cycle multiplier