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１．概述ＭＡＸ３１４０内部集成了一个通用的ＵＡＲＴ和失效安全模式的ＲＳ－４８５／ＲＳ－４２２收发器。其ＵＡＲＴ部分的编程采用ＳＰＩＴＭ／ＱＳＰＩＴＭ／ＭＩＣＲＯＷＩＲＥＴＭ兼容的串行接口，大大简化了ＭＡＸ３１４０与μＰ的连接；而ＲＳ－４８５／ＲＳ－４２
1. Overview The MAX3140 integrates a universal UART and fail-safe RS-485 / RS-422 transceivers. The UART part of the programming using SPITM / QSPITM / MI CWIRETM compatible serial interface, greatly simplifies the MAX3140 and μP connection; and RS-485 / RS-42