摘要
介绍了利用可编程逻辑阵列把1路RS232扩展至4路RS422的串行口电路设计方法。该扩展电路不占用PC系统资源 ,同时具有结构简单 ,使用方便 ,通用性和可补性强等特点 ,可广泛应用于主从式多机通讯系统中。
Based on a PLA(programmable logic array)is introduced a hardware design method of extending SCI(serial communication interface)from one channel RS232to four channels RS422.The extending circuit don't change the hardware of PC and is a simple configuration.It can be used widely in the multi computer communiˉcation.
出处
《国外电子元器件》
2004年第6期6-8,共3页
International Electronic Elements
