Q. Port C of 8255 can function independently as
✅ Correct Answer: (C)
either input or output ports
Mechatronics MCQs | Page - 7
Dear candidates you will find MCQ questions of Mechatronics here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.
Q. All the functions of the ports of 8255 are achieved by programming the bits of an internal register called
✅ Correct Answer: (C)
control word register
Q. The data bus buffer is controlled by
✅ Correct Answer: (B)
read/write control logic
Q. The input provided by the microprocessor to the read/write control logic is
✅ Correct Answer: (D)
all of the mentioned
Q. The device that receives or transmits data upon the execution of input or output instructions by the microprocessor is
✅ Correct Answer: (C)
3-state bidirectional buffer
Q. The port that is used for the generation of handshake lines in mode 1 or mode 2 is
✅ Correct Answer: (D)
port c upper
Q. If A1=0, A0=1 then the input read cycle is performed from
✅ Correct Answer: (B)
port b to data bus
Q. The pin that clears the control word register of 8255 when enabled is
✅ Correct Answer: (C)
reset
Q. Which of the following steps detects the key in a 4*4 keyboard matrix about the key that is being pressed?
✅ Correct Answer: (D)
all of the mentioned
Q. To detect that in which column, the key is placed?
✅ Correct Answer: (D)
all of the mentioned
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