AVR核將32個工作寄存器和豐富的指令集聯(lián)結(jié)在一起。所有的工作寄存器都與算術(shù)邏輯單元ALU直接相連,允許在一個時鐘周期內(nèi)執(zhí)行的單條指令同時訪問2個獨立的寄存器。這種結(jié)構(gòu)提高了代碼效率,使AVR得到了比普通CISC單片機高將近10倍的性能。 ATtiny12 工作于空閑模式時,CPU將停止運行,而定時器/計數(shù)器和中斷系統(tǒng)將繼續(xù)工作;掉電模式時振蕩器停止工作,所有功能都被禁止,而寄存器內(nèi)容得到保留。只有外部中斷或硬件復(fù)位才可以退出此狀態(tài)。引腳電平變化中斷的特點使得ATtiny12 對外部事件有很高的響應(yīng)性,同時具有掉電模式的低功耗優(yōu)點。 ATtiny12 內(nèi)部集成有RC振蕩器,其固定頻率為1MHz。它還可以通過XTAL1和XTAL2引腳外接晶體振蕩器或陶瓷振蕩器。當(dāng)使用外部時鐘時,XTAL2應(yīng)懸空。通過熔絲位控制,可以有多種時鐘選擇。 The ATtiny12 is a low-power CMOS 8-bit microcontroller based on the AVR RISC architecture. By executing powerful instructions in a single clock cycle, the ATtiny10/11/12 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. All the 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 ATtiny11/12 AVR is supported with a full suite of program and system development tools including: macro assemblers, program debugger/simulators, in-circuit emulators, and evaluation kits.
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