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The receive buffer of serial data buffer is a

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The receive buffer of serial data buffer is a

(a) serial-in parallel-out register

(b) parallel-in serial-out register

(c) serial-in serial-out register

(d) parallel-in parallel-out register

I have been asked this question in an international level competition.

The query is from Architecture of 8051 in portion Microcontroller 8051 of Microprocessor

1 Answer

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by (49.2k points)
Correct answer is (a) serial-in parallel-out register

The explanation: The serial data register has two buffers. The transmit buffer is a parallel-in serial-out register and receive buffer is a parallel-in serial-out register.

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