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ENEL608 Microcontrollers Week 5: Hardware Events & Interrupts

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ENEL608 Microcontrollers Week 5: Hardware Events & Interrupts

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Questions and Answers

What does a UDRE value of 0 in register UCSRA indicate?

The USART is disabled and cannot transmit data.

The receive buffer is empty and ready for receiving a new byte.

The transmit buffer is empty and ready for writing a new byte. (correct)

An error has occurred in the USART transmission process.

What does an ADSC value of 0 in register ADCSRA signify?

The digital result is ready for further processing.

An analogue-digital conversion has been completed. (correct)

The conversion process has not started.

An error has occurred during the conversion process.

In the context of hardware events, what does polling refer to?

Interrupting the normal flow of program execution.

Performing a one-time check for system errors.

Initiating a data transfer process between peripherals.

Repeatedly checking if a specific condition or event has occurred. (correct)

If bit ADATE in register ADCSRA is 1, what does this indicate?

Automatic triggering of analogue-digital conversions is enabled. Signup and view all the answers

What impact does a value of 0 in bit ADEN have on an ADC operation?

Disables the ADC module. Signup and view all the answers

What is a hardware event in the context of microcontrollers?

Completion of a conversion by the analogue-digital converter Signup and view all the answers

How are hardware events recognized on a microcontroller?

By monitoring status bits in control/status registers Signup and view all the answers

Which of the following is an example of a hardware event as described in the text?

Setting a pin to high to initiate an analogue-digital conversion Signup and view all the answers

In what manner are hardware events different from software events on microcontrollers?

Hardware events involve physical signal changes, while software events are entirely virtual Signup and view all the answers

Why is it important to monitor hardware events on a microcontroller?

To ensure timely and accurate responses to external stimuli Signup and view all the answers