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Is RS232 synchronous or asynchronous?

Synchronous serial communication

Optical burst switching

Data transmission circuit

Hardware Trojan

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RS232 is an asynchronous protocol for serial communication . It is used for transmitting data between two terminals and does not require a continuous stream of data . The data is serialized with a start bit, data bits, and a stop bit . The RS232 protocol does not rely on a clock signal for synchronization and allows for intermittent transmission of data . The aim of RS232 is to achieve non-standard and standard baud rate synchronous transmission . The protocol is widely used for various applications, including monitoring wind speed in wind power plants .

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Patent 자동 rs232/rs485통신컨버터 정태경 15 May 2001 2 Citations	The text does not explicitly mention whether RS232 is synchronous or asynchronous.
Proceedings Article•DOI Optical transceiver with deficit round robin and RS232 interface for synchronous optical networking Guo-Ming Sung, Wen-Duen Chou, Tzu-Hsuan Chiu - Show less +2 more 01 Oct 2016 1 Citations	RS232 is an asynchronous interface used in the optical transceiver for synchronous optical networking.
Open access•Journal Article Hardware Trojan Design Based on Interval Property of RS232 Protocol Xie Fang-fan 01 Jan 2013-Science Technology and Engineering 1 Citations	RS232 is asynchronous.
Open access Command-Response Test setup for Embedded computer using RS232 on FPGA Ajay Khare 01 Jan 2014 1 Citations	RS232 is a synchronous protocol used for serial binary single-ended data and control signals connecting between two terminals.
Patent RS232 data transmission circuit for monitoring ultrasonic wind speed in wind power plant Wang Ningbo, Lu Liang, He Shien, Wang Xiaoyong, Zhang Jinping, Huang Rong - Show less +5 more 18 Jun 2014	The RS232 data transmission circuit mentioned in the text uses a universal asynchronous receiver/transmitter (UART) kernel module.

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