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Description

The ATtiny28 is a low-power CMOS 8-bit microcontroller based on the AVR RISC architecture. By executing powerful instructions in a single clock cycle, the ATtiny28 achieves throughputs approaching 1 MIPS per MHz, allowing the system designer to optimize power consumption versus processing speed. The AVR core combines a rich instruction set with 32 general-purpose working registers.

Features

? Utilizes the AVR? RISC Architecture

? AVR – High-performance and Low-power RISC Architecture

– 90 Powerful Instructions – Most Single Clock Cycle Execution

– 32 x 8 General-purpose Working Registers

– Up to 4 MIPS Throughput at 4 MHz

? Nonvolatile Program Memory

– 2K Bytes of Flash Program Memory

– Endurance: 1,000 Write/Erase Cycles

– Programming Lock for Flash Program Data Security

? Peripheral Features

– Interrupt and Wake-up on Low-level Input

– One 8-bit Timer/Counter with Separate Prescaler

– On-chip Analog Comparator

– Programmable Watchdog Timer with On-chip Oscillator

– Built-in High-current LED Driver with Programmable Modulation

? Special Microcontroller Features

– Low-power Idle and Power-down Modes

– External and Internal Interrupt Sources

– Power-on Reset Circuit with Programmable Start-up Time

– Internal Calibrated RC Oscillator

? Power Consumption at 1 MHz, 2V, 25°C

– Active: 3.0 mA

– Idle Mode: 1.2 mA

– Power-down Mode: <1 μA

? I/O and Packages

– 11 Programmable I/O Lines, 8 Input Lines and a High-current LED Driver

– 28-lead PDIP, 32-lead TQFP, and 32-pad MLF

? Operating Voltages

– VCC: 1.8V - 5.5V for the ATtiny28V

– VCC: 2.7V - 5.5V for the ATtiny28L

? Speed Grades

– 0 - 1.2 MHz for the ATtiny28V

– 0 - 4 MHz For the ATtiny28L