The ATTINY861-20SU 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 ATtiny861 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 ATtiny861 provides 8kB of in-system programmable flash, 512byte EEPROM and 512byte SRAM. The device achieves a throughput of 20MIPS at 20MHz.
Advanced RISC architecture
123 Powerful instructions most single clock cycle execution
32 x 8 General purpose working registers
Fully static operation
On-chip analog comparator
Programmable watchdog timer with separate on-chip oscillator
Universal serial interface with start condition detector
DebugWIRE on-chip debug system
In-system programmable via SPI port
External and internal interrupt sources
Low power idle, ADC noise reduction, standby and power-down modes
(EN)
