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The PCA9555 is a 24-pin CMOS device that provides 16 bits of General Purpose parallelInput/Ou
随着智能表越来越多的使用， 各种类型的抄表器（既M-BUA主站）需求也随之增加。M-BUS接口电路作为抄表器的一个主要模块， 决定了抄表器性能的好坏， 也较为影响抄表器的成本高低。现今大多数抄表器都是延用TI 推荐的M-BUS接口电路方案（...
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Universal Serial Bus Device Class Specification for Device Firmware Upgrade This document
Universal Serial Bus Device Class Definition for MIDI Devices 1 IntroductionFollowing
Under contract with Signetics, Mr. Thomas J. Chaney of WashingtonUniversity, St. Louis tested a
Universal Serial Bus Device Class Definition for Printing Devices The Universal Serial Bu