The ATTINY44-20PU is a low-power 8-bit CMOS Microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATtiny44 achieves throughputs approaching 1MIPS 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. All 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 ATtiny44 provides 4kB of in-system programmable flash, 256byte EEPROM and 256byte SRAM. The device supports a throughput of 20MIPS at 20MHz.
Advanced RISC architecture
120 Powerful instructions most single clock cycle execution
32 x 8 General purpose working registers
Fully static operation
One 8-bit and one 16-bit timer/counter with two PWM channels, each
Programmable watchdog timer with separate on-chip oscillator
On-chip analog comparator
Universal serial interface
DebugWIRE on-chip debug system
In-system programmable via SPI port
Internal and external interrupt sources - Pin change interrupt on 12 pins
Low power idle, ADC noise reduction, standby and power-down modes
Enhanced power-on reset circuit
Programmable brown-out detection circuit
Internal calibrated oscillator
On-chip temperature sensor
Twelve Programmable I/O lines
300μA at 1.8V (1MHz System Clock) Active mode power consumption
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