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Which bit of the IE register is used to enable TxD/RxD interrupt?

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in Microcontroller by (14.6k points)
Which bit of the IE register is used to enable TxD/RxD interrupt?

(a) IE.D5

(b) IE.D2

(c) IE.D3

(d) IE.D4

The question was posed to me in an international level competition.

Enquiry is from Interrupt Programming topic in division 8051 Microcontroller of Microcontroller

1 Answer

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by (24.2k points)
Correct choice is (d) IE.D4

Explanation: IE.D4 is used to enable RS interrupt or the serial communication interrupt.

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