USB的NRZI編碼方式,將原數(shù)據(jù)進(jìn)行處理,原數(shù)據(jù)為0時(shí),編碼成電平翻轉(zhuǎn),原數(shù)據(jù)為1時(shí),編碼成電平不翻轉(zhuǎn),USB要發(fā)送數(shù)據(jù)的時(shí)候,硬件把數(shù)據(jù)流轉(zhuǎn)化成為NRZI編碼,然后經(jīng)過(guò)USB的差分線D+和D-將數(shù)據(jù)發(fā)送出去,接收方在接收數(shù)據(jù)的后做逆處理,要注意的是,在沒(méi)有數(shù)據(jù)傳輸?shù)臅r(shí)候,也就是空閑的時(shí)候,數(shù)據(jù)線是保持高電平的,這點(diǎn)一定要注
www.dbjr.com.cn/article/1529...htm 2025-6-1