The ATTINY25-20SUR 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 ATtiny25 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 ATtiny25 provides 2kB of in-system programmable flash, 128byte EEPROM and 128byte SRAM. The device achieves a throughput of 16MIPS at 16MHz.
Advanced RISC architecture
120 Powerful instructions most single clock cycle execution
32 x 8 General purpose working registers
Fully static operation
8-bit Timer/counter with prescaler and two PWM channels
8-bit high-speed Timer/counter with separate prescaler
USI-universal serial interface with start condition detector
Programmable watchdog timer with separate on-chip oscillator
On-chip analog comparator
DebugWIRE on-chip debug system
In-system programmable via SPI port
External and internal interrupt sources
Low power idle, ADC noise reduction and power-down modes
Enhanced power-on reset circuit
Programmable brown-out detection circuit
Internal calibrated oscillator
Six programmable I/O lines
300μA at 1.8V (1MHz System Clock) Active mode power consumption
