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Which of the following is the first flow control method?

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Which of the following is the first flow control method?

(a) software handshaking

(b) hardware handshaking

(c) UART

(d) SPI

The question was posed to me during an online exam.

This is a very interesting question from Asynchronous Flow Control topic in chapter Basic Peripherals of Embedded Systems

1 Answer

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Best answer
Correct answer is (b) hardware handshaking

Explanation: The first flow control method is the hardware handshaking in which the hardware in the UART detects the potential overrun and it will assert a handshake line to tell the other UART to stop the transmission.

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