便攜式設(shè)計(jì)的多核解決方案

　　一開(kāi)始有手機(jī)，而且很好——事實(shí)上，它們是磚塊的大小和重量，只能做一件事：打電話(huà)。今天的手機(jī)是二十一世紀(jì)的微型計(jì)算機(jī)，能夠運(yùn)行無(wú)數(shù)的“應(yīng)用程序”，流高清視頻和高質(zhì)量的音頻，捕捉和處理12萬(wàn)像素的圖片，并仍然打電話(huà)。

　　穆?tīng)柖杀M管如此，但對(duì)于單個(gè)處理器來(lái)說(shuō)，這是一個(gè)很大的問(wèn)題，尤其是一個(gè)需要在很長(zhǎng)一段時(shí)間內(nèi)從一個(gè)小電池進(jìn)行操作的處理器。手機(jī)早已使用獨(dú)立的應(yīng)用處理器來(lái)從主處理器上卸載工作。然而，在一個(gè)低功耗的雙核心的big.little方法–和NXP公司的ARM的它實(shí)施近期出臺(tái)（M4 / M0）嵌入式單片機(jī)–移動(dòng)非對(duì)稱(chēng)多核處理器（AMPS）在其他便攜式設(shè)備將很快從生態(tài)位移動(dòng)到主流。

　　Texas Instruments’ OMAP and DaVinci

　　Texas Instruments’ OMAP? SoCs have long been the dominant applications processors in cellular handsets. Since streaming video and audio are best handled by a DSP in the data path， OMAP SoCs all combine a general-purpose ARM? processor with a TI DSP.

　　The original 130 nm OMAP 1 family – such as the OMAP5912ZZG – paired a 192 MHz ARM926EJ-S? with a TMS320C55x? DSP core. The internal bus structure – one program bus， three data read buses， two data write buses， and additional buses for peripheral and DMA activity – efficiently enabled the DSP to perform up to three data reads and two data writes in a single cycle for relatively high-speed video and image processing.