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3 2588B–AVR–11/06 ATtiny261/461/861 2. Overview The ATtiny261/461/861 is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATtiny261/461/861 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed. 2.1 Block Diagram Figure 2-1. Block Diagram PORT A (8) PORT B (8) USI Timer/Counter1 Timer/Counter0 A/D Conv. Internal Bandgap Analog Comp. SRAM Flash EEPROM Watchdog Oscillator Watchdog Timer Oscillator Circuits / Clock Generation Power Supervision POR / BOD & RESET PROGRAM LOGIC debugWIRE AGND AREF AVCC PA[0..7] PB[0..7] 11 RESET XTAL[1..2] CPU 3 |
