< Learning Perl>> published by O Reilly & Associates, the complete reference book on the l
< Learning Perl>> published by O Reilly & Associates, the complete reference book on the language. English....
< Learning Perl>> published by O Reilly & Associates, the complete reference book on the language. English....
Delphi控件源码EjunPYComboBox.rarhenhaoyong o...
一个PL/O编译器,内含可执行程序,大家有用下载着看吧A PL /O compiler,Containing executable. it may be useful to download Look here!C-C...
普通I/O口扩展,使其模拟串口显示数据,主要节省I/O资源。...
在多数情况下,集成电路芯片的管脚不会全部被使用。例如74ABT16244系列器件最多可以使用16路I/O管脚,但实际上通常不会全部使用,这样就会存在悬空端子。所有数字逻辑器件的无用端子必须连接到一个高电平或低电平,以防止电流漂移(具有总线保持功能的器件无需处理不用输入管脚)。究竟上拉还是下拉由实际器...