Most portable computers have built-in sockets to acceptsmall PC cards for use as extended memories, fax modems,network interfaces, wireless communicators and awide assortment of
2013-11-18 09:52:02
下载 157
查看 1,069
www.eeworm.com
一种异步串行通信接口信号.RS485是一种通信接口，里面的信号类似于一种差分信号，两个电平的差值大概是200mV左右，抗干扰性能比较好。
2024-05-12 12:50:01
下载 3
查看 8,853