The single-chip MODEM majors in MCU control system. This paper introduced the fundamentals of the chip, the interface circuit linking 73K222AL and AT89C51, and its programs.
文章分析了它的主要特性，同时给出了73K222AL与单片机AT89C51的接口电路和应用程序设计。
This papers is about the design of the interface based on the modem ST7538 , measuring and analyzing the performance of the interface.
本文根据选用的调制解调模块ST7538设计了一种接口电路并对它的性能进行了测试分析。
Also, this PLC transparent modem optionally supports RS-485 interface for compatibility reasons.
而且，该透明的PLC调制解调器由于其兼容性，可任意的支持RS- 485接口。
In the remote, the microcontroller through RS232 serial interface controls MODEM, and the local main computer is made up of system computer and MODEM.
远端由单片机通过RS232串行口控制调制解调器，本地主机由系统机和调制解调器组组成。
Interface circuit and the design of control program in asynchronous transfer mode between AT89C51 single chip microcomputer system and intelligent MODEM are introduced.
介绍AT 89 C51单片机系统与智能调制解调器MODEM之间的接口电路和异步传输方式下的控制程序设计。
Interface circuit and the design of control program in asynchronous transfer mode between AT89C51 single chip microcomputer system and intelligent MODEM are introduced.
介绍AT 89 C51单片机系统与智能调制解调器MODEM之间的接口电路和异步传输方式下的控制程序设计。
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