A.11111111 B.10101010 C.00000000 D.10000000
A.計(jì)數(shù)器 B.數(shù)據(jù)寄存器 C.電壓比較器 D.積分器
A.電源電壓VCC B.1/2 VCC C.1/3 VCC D.2/3 VCC