RS - 485的三态能力允许以半双工通讯的方式分享传送和接收信号的一对导线。
The tristate capabilities of RS-485 allow a single pair of wires to share transmit and receive signals for half-duplex communications.
压电谐振器，及其制造方法，滤波器，双工器和通讯器件。
Piezoelectric resonator, production method thereof, filter, duplexer, and communication device.
SPCE061A的全双工异步通讯的串行接口可实现多机通讯，组成了步式控制系统。
SPCE061A duplexing asynchronous serial interface of communication can realize many machine communication, make up step type control system all.
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