Unit 3.1 : Programming model - Register

Open Ended

Why do you think understanding registers and addressing modes is important for programming design?

Multiple Choice

Which of the following topics is NOT mentioned as part of the contents in this chapter?

• Registers

• Data and addressing register

• Programming languages

• Programming design

Fill in the Blank

In the context of AVR microcontroller memory, fill in the blank: The ________ is used to store the firmware or program code.

Multiple Choice

Which of the following are the three main types of memory blocks in an AVR microcontroller?

• Program Memory (Flash), Data Memory (SRAM), EEPROM

• RAM, ROM, Cache

• Program Memory (Flash), Hard Disk, EEPROM

• SRAM, DRAM, EEPROM

Multiple Choice

Which components are involved in the 'fetch' step of instruction processing in an AVR microcontroller?

• Program Counter and Instruction Register

• ALU and Status Register

• EEPROM and Data SRAM

• I/O Module and Watchdog Timer

Open Ended

Describe the role of General-Purpose Registers (GPRs) and I/O Registers during the execution of instructions in an AVR microcontroller.

Multiple Choice

What is the primary function of the Status Register (SR) during the execution of instructions in an AVR microcontroller?

• To store the address of the next instruction

• To temporarily hold the fetched instruction

• To monitor and update the status of operations

• To facilitate interaction with external devices

Open Ended

Explain the sequence of steps that the CPU follows to process an instruction in an AVR microcontroller.

Multiple Choice

Which components are used to store results for immediate use in a microcontroller, as shown in the system overview?

• General-Purpose Registers (GPRs)

• EEPROM

• Flash Program Memory

• Watchdog Timer

Open Ended

Describe the process of reading a sensor and updating an LED in a microcontroller system, including the roles of fetching, decoding, and execution.

Multiple Select

Which of the following are types of registers found in a microcontroller?

• General Purpose Register

• Special Function Registers (SFR)

• EEPROM

• Data SRAM

Fill in the Blank

Fill in the blank: A register is a temporary storage area built into the ___.

Multiple Choice

What is the main function of a General Purpose Register (GPR) in a microcontroller?

• To store temporary data for arithmetic and logic operations

• To store program instructions permanently

• To control the watchdog timer

• To manage external interrupts

Open Ended

Explain the difference in memory location between General Purpose Registers and I/O Registers in AVR microcontrollers.

Multiple Choice

Which AVR I/O port is primarily used for analogue inputs?

• PORT A

• PORT B

• PORT C

• PORT D

Open Ended

Explain the function of the three registers associated with each I/O port in AVR microcontrollers.

Fill in the Blank

To set all pins of Port D as output, DDRD should be set to ___

Multiple Select

Which of the following statements about the DDRx register are correct?

• It configures the data direction of port pins.

• A value of '0' sets the pin as input.

• A value of '1' sets the pin as output.

• It must be declared before using PINx or PORTx.

Open Ended

Describe how you would configure Port B for output and then read its value in an AVR microcontroller program.

Multiple Choice

What is the first step required before reading data from a port using the PINx register?

• Set the port as input by configuring DDRx to 0x00

• Set the port as output by configuring DDRx to 0xFF

• Write data to the port using PORTx

• Enable interrupts

Multiple Choice

What is the function of the PORTx register when DDRx is set to 1?

• It configures the port as input

• It configures the port as output

• It enables pull-up resistors

• It disables pull-up resistors

Multiple Select

Which of the following statements are true about setting all pins of port D as outputs and HIGH?

• DDRD should be set to 0xFF

• PORTD should be set to 0xFF

• All bits of DDRD should be 0

• All bits of PORTD should be 0

Fill in the Blank

To make only PD0–PD2 as output, DDRD should be set to ___ (in hexadecimal).

Open Ended

Explain how you would configure port A to output a variable value and describe what happens when the value of the variable changes.

Multiple Choice

When configuring a port as INPUT, what value should DDRx be set to in order to activate the pull-up resistor?

• 1

• 0

• 2

• None of the above

Multiple Select

To enable pull-up resistors for all pins of port D, which of the following steps are necessary?

• Set DDRA to 0x00

• Set PORTA to 0xFF

• Set DDRD to 0x00

• Set PORTD to 0xFF

Open Ended

After learning about registers, data and addressing registers, addressing modes, and programming design, what questions do you still have about the programming model?

Multiple Select

Which of the following topics will you learn about in this chapter?

• Registers

• Data and addressing register

• Addressing modes

• Programming design