isBC534四通道通讯扩展板是英特尔isBC80系统扩展模块中的成员,它具有扩展串行通讯能力,在此单板上含有4个可编程的同步和异步串行I/O通道,每个通道都具有RS232C缓冲器,并且可由用户随意安置20mA光电隔离的电流环转接口。它含有6个可程控的定时器,提供给串行口传输波特率使用或者提供定时使用。它含有一个可程控的并行I/O口,具有16 The isBC534 Quad Communications Expansion Board, a member of the Intel isBC80 System Expansion Module, features extended serial communications capability with four programmable synchronous and asynchronous serial I / O channels on each board, each with RS232C buffer, and can be freely placed by the user 20mA opto-isolated current loop interface. It contains six programmable timers, provide serial port transmission baud rate or provide regular use. It contains a programmable parallel I / O port, with 16