A.1μs B.2μs C.4μs D.8μs
A.字符/秒 B.位/秒 C.幀/秒 D.字節(jié)/秒
MCS-51單片機串行口發(fā)送數(shù)據(jù)的次序是下述的順序()。 (1)待發(fā)送數(shù)據(jù)送SBUF (2)硬件自動將SCON的TI置1 (3)經(jīng)TXD(P3.1)串行發(fā)送一幀數(shù)據(jù)完畢 (4)用軟件將TI清0
A.(1)(3)(2)(4) B.(1)(2)(3)(4) C.(4)(3)(1)(2) D.(3)(4)(1)(2)