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Which of the following statements accurately describes the I/O ports of 8051 microcontrollers?
Which of the following statements accurately describes the I/O ports of 8051 microcontrollers?
- There are 4 I/O ports, each with 8 pins, which can be configured as input or output. (correct)
- There are 8 I/O ports, each with 4 pins, which can be configured as input or output.
- There are 4 I/O ports, each with 8 pins, which can only be configured as output.
- There are 4 I/O ports, each with 8 pins, which can only be configured as input.
What happens when a pin of an I/O port is configured as an input?
What happens when a pin of an I/O port is configured as an input?
- The pin acts as if it 'floats', with unlimited input resistance and indeterminate potential. (correct)
- The pin acts as an 'open drain', allowing external output to float.
- The pin is connected to a pullup resistor.
- The pin is connected to ground (0V).
What happens when a pin of an I/O port is configured as an output and logic 0 is applied?
What happens when a pin of an I/O port is configured as an output and logic 0 is applied?
- The pin is connected to a pullup resistor.
- The pin acts as an 'open drain', allowing external output to float.
- The pin acts as if it 'floats', with unlimited input resistance and indeterminate potential.
- The pin is connected to ground (0V). (correct)
What happens when a pin of an I/O port is configured as an output and logic 1 is applied?
What happens when a pin of an I/O port is configured as an output and logic 1 is applied?
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What is required to apply logic 1 (5V) on an output pin of an I/O port?
What is required to apply logic 1 (5V) on an output pin of an I/O port?
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