將單片機(jī)和DSP功能塊和基于數(shù)據(jù)流的處理

　　微控制器做好控制用戶(hù)界面的工作。他們可以初始化其他電路，監(jiān)控輸入，反應(yīng)中斷，并驅(qū)動(dòng)輸出顯示和控制。然而，當(dāng)模擬功能，如A/D轉(zhuǎn)換器、D/A轉(zhuǎn)換器、PWMs、參考電壓，運(yùn)算放大器和比較器，讓單片機(jī)的功能在模擬領(lǐng)域，這對(duì)于許多相對(duì)簡(jiǎn)單的模擬處理任務(wù)總體上是常見(jiàn)的，微控制器通常是弱時(shí)，模擬信號(hào)的處理。

　　恒溫器是一個(gè)很好的例子，幾乎任何混合信號(hào)微控制器可以處理。它監(jiān)視一個(gè)溫度，將它與設(shè)定點(diǎn)進(jìn)行比較，并拋出一個(gè)開(kāi)關(guān)。您可以添加編程滯后，定時(shí)操作，云，和全世界的連接到它，但底線是，MCU拋出或釋放一個(gè)開(kāi)關(guān)來(lái)執(zhí)行其任務(wù)。

　　In the real world， however， most control loops operate much faster than a room’s temperature change， and monitor more than just one input. This is where basic attributes such as speed， performance， and flexible architecture are important， but also important is the type of DSP functionality either merged into the core of the microcontroller， or， sitting side by side with a microcontroller to tackle analog functionality， especially with block- or stream-oriented types of processing needs.

　　This article looks at levels of DSP functionality available in standard microcontrollers， as well as the features used to turn analog-signal processing into digital-domain solutions. All parts， datasheets， tutorials， and development kits referenced here can be found online at Digi-Key’s website.