解釋馬克西姆RS-4...

Abstract: Three common serial data standards, RS-232, RS-422, and RS-485, are described by specification and electrical interface. Cable termination techniques, use of multiple loads, daisy-chaining of RS-232, conversion of RS-232 to RS-48...

Abstract: Intersymbol interference in RS-485 data transmission systems is discussed, with emphasis on improving transmission data rates or line lengths. RS-485 transceivers having internal driver pre-emphasis and corresponding receiver de-...

Abstract: This paper describes methods of saving power in RS-485 data communication systems. Methods include low-power transceiver integrated circuits (ICs), ICs with built-in fail-safe thresholds allowing the elimination of cable fail-saf...

Abstract: Applying a unique 3-channel RS-485 transceiver displaying many unusual features increases reliability and fault-detection in motor-control applications. Designed specifically for motor shaft encoder applications, the MAX3097 and ...

Abstract: Electrical specifications are presented for the RS-422 unidirectional, RS-485 full-duplex and PROFIBUS data transmission systems. Electrostatic discharge (ESD) protection, data rates, and loading conditions are considered. The co...

Abstract: The proper method of wiring an RS-485 network is described, with recommendations for twisted-pair cabling and correctly locating termination resistors. Received waveforms are shown for examples of proper and improper cable termin...

Abstract: This application note describes functional operation of MAX3157 RS-485 transceiver with ±50V isolation and internal power transfer across the isolation barrier. Common-mode signals are described, and the origin of CMR voltages i...

Abstract: RS-485 transceivers offer an easy way to implement the physical layer in industrial networks; several fieldbus standards specify an RS-485 serial port for communications. This article describes several fieldbus technologies, and ...

摘要：工業(yè)數(shù)據(jù)通訊系統(tǒng)設(shè)計(jì)常常面臨這樣的疑問(wèn)：在多點(diǎn)、中等速率、串行數(shù)據(jù)通訊中，成本最低的方案是什么？能夠獲得的最高傳輸速率是多大，傳輸?shù)木嚯x有多遠(yuǎn)？如何實(shí)現(xiàn)...

Some of the interface ICs currently available for serial-data transmission not only operate from low VCC levels (5V or 3.3V); they also generate bipolar dc voltages (±6.5V to ±10V) to support the minimum driver-output levels as specified...

Abstract: RS-232 features are explained in a way that makes it easy to select an appropriate RS-232 communication IC to meet any system need. Special attention is given to, signal swings, slew rates, enhanced ESD protection as well as data...

Abstract: Due to its relative simplicity and low hardware overhead (when compared to parallel interfacing), serial communications is used extensively within the electronics industry. Today, the most popular serial communications standard i...

Abstract: Technical brief suggests ESD protection schemes for RS-232 transceivers. Basic diode clamps, TransZorb™, and zener diodes are considered. Internal latch-up is explained. Protection of vulnerable CMOS devic...

Abstract: The requirements for interconnect between computers, cell phones or PDA devices are examined as related to the use of data-lump cables. Consideration is given to channel count, supply limitations, RS-232 compatibility or complian...

New RS-232...

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Abstract: This application note discusses the timing requirements for the commonly used serial asynchronous communications protocol implemented in UARTs, and shows how to determine the tolerance for the UART clock source at both ends of an...

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Abstract: This article explains how to interface a GPIO port to an SPI peripheral. It defines the basics of the SPI protocol, the signals and the four transfer variations for the SCK signal. A software routine is included to implement the ...