Dual asynchronous receiver/transmitter (DUART)

DESCRIPTION The Philips Semiconductors SCC2681 Dual Universal Asynchronous Receiver/Transmitter (DUART) is a single-chip MOS-LSI communications device that provides two independent full-duplex asynchronous receiver/transmitter channels in a single package. The SCC2681T features a faster bus cycle

文件：108.22 Kbytes 頁(yè)數(shù)：15 Pages

PHI

PHI

Dual asynchronous receiver/transmitter (DUART)

DESCRIPTION The Philips Semiconductors SCC2681 Dual Universal Asynchronous Receiver/Transmitter (DUART) is a single-chip MOS-LSI communications device that provides two independent full-duplex asynchronous receiver/transmitter channels in a single package. The SCC2681T features a faster bus cycle

文件：108.22 Kbytes 頁(yè)數(shù)：15 Pages

PHI

PHI

Dual asynchronous receiver/transmitter (DUART)

恩XP

雙通道異步接收器/發(fā)送器(DUART)

Philips Semiconductors SCC2681兩路通用異步接收器/發(fā)送器(DUART)是一款單芯片MOS-LSI通信器件，在單個(gè)封裝中提供兩條獨(dú)立的全雙工異步接收器/發(fā)送器通道。SCC2681T具有比標(biāo)準(zhǔn)SCC2681更快的總線周期時(shí)間。快速總線周期能通過(guò)快速CPU消除或減少等待狀態(tài)的需求，并允許I/O增強(qiáng)系統(tǒng)有高吞吐量。發(fā)送器、接收器和計(jì)數(shù)器定時(shí)器可使用更高的外部時(shí)鐘速率，從而提供更大的波特率生成通用性。SCC2681T直接連接微處理器，可用于輪詢或中斷驅(qū)動(dòng)系統(tǒng)。用CMOS技術(shù)制造。\n可對(duì)各通道的工作模式和數(shù)據(jù)格式進(jìn)行單獨(dú)編程。另外，每個(gè)接收器和發(fā)送器可將其工作速度選為十八個(gè) 快速總線周期時(shí)間減少或消除CPU等待狀態(tài)\n雙路全雙工異步接收器/發(fā)送器\n四重緩沖接收器數(shù)據(jù)寄存器\n可編程數(shù)據(jù)格式 5至8數(shù)據(jù)位外加奇偶校驗(yàn)\n奇、偶、無(wú)奇偶校驗(yàn)或強(qiáng)制奇偶校驗(yàn)\n可以1/16位的增量對(duì)1、1.5或2停止位進(jìn)行編程\n\n16位可編程計(jì)數(shù)器/定時(shí)器\n每個(gè)接收器和發(fā)送器可選的可編程波特率為： 22個(gè)固定速率：50至115.2 k波特\n非標(biāo)準(zhǔn)速率至115.2\n源自可編程計(jì)數(shù)器/定時(shí)器的非標(biāo)準(zhǔn)用戶定義速率\n外部1×或16×?xí)r鐘\n\n奇偶校驗(yàn)、成幀和超載錯(cuò)誤檢測(cè)\n錯(cuò)誤起始位檢測(cè)\n線中止的產(chǎn)生和檢測(cè) \n可編程通道模式 正常（全雙工）\n自動(dòng)回波\n本地環(huán)回\n遠(yuǎn)程環(huán)回;

恩XP