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In serial port interrupt, after the control is transferred to the interrupt service routine, the flag that is cleared is

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In serial port interrupt, after the control is transferred to the interrupt service routine, the flag that is cleared is

(a) RI

(b) TI

(c) RI and TI

(d) None

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

The above asked question is from Interrupt and Stack of 8051 -1 topic in chapter Microcontroller 8051 of Microprocessor

1 Answer

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by (49.2k points)
Right answer is (d) None

To explain: In serial port interrupt, after the control is transferred to the interrupt service routine, neither of the flags are cleared.

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