AD 7888是12位8通道串行模数转换器,采用单电源供电.详细阐述了低功耗、高精度A/D转换器AD 7888的特点、引脚功能、时序图、控制寄存器、工作模式选择和外部接口;给出了AD 7888与单片机AT 89 C 51的硬件接口电路和不同读写方式下的程序...AD 7888是12位8通道串行模数转换器,采用单电源供电.详细阐述了低功耗、高精度A/D转换器AD 7888的特点、引脚功能、时序图、控制寄存器、工作模式选择和外部接口;给出了AD 7888与单片机AT 89 C 51的硬件接口电路和不同读写方式下的程序流程图.展开更多
1.Community of purpose makes friendship. 友谊来自共同的目标。2.Without confidence there is no friendship.友谊源于信任。3.Friendship’s the wine of life.友谊乃人生之美酒。4.Friendship multiplies joys,and divides griev...1.Community of purpose makes friendship. 友谊来自共同的目标。2.Without confidence there is no friendship.友谊源于信任。3.Friendship’s the wine of life.友谊乃人生之美酒。4.Friendship multiplies joys,and divides grieves.友谊使快乐倍增,使忧愁减半。5.Friendship is,at any rate,a relation of perfect equality.友谊是一种完全基于平等的关系。6.Fire is the test of gold,adversity of friendship.烈火试真金,患难见真情。7.A friend to everybody is a friend to nobody.滥交者无友。展开更多
文摘1.Community of purpose makes friendship. 友谊来自共同的目标。2.Without confidence there is no friendship.友谊源于信任。3.Friendship’s the wine of life.友谊乃人生之美酒。4.Friendship multiplies joys,and divides grieves.友谊使快乐倍增,使忧愁减半。5.Friendship is,at any rate,a relation of perfect equality.友谊是一种完全基于平等的关系。6.Fire is the test of gold,adversity of friendship.烈火试真金,患难见真情。7.A friend to everybody is a friend to nobody.滥交者无友。