A.3490H:00ABH B.0349H:00ABH C.3255H:245BH D.00ABH:3490H
A.輸入引腳 B.輸出引腳 C.高電平表示存儲(chǔ)器或外設(shè)已準(zhǔn)備好 D.低電平表示存儲(chǔ)器或外設(shè)已準(zhǔn)備好
A. B.HOLD C.DEN D.READY