.Assuming the processor frequency is 20 MHz, find the highest square wave frequency that can be generated using Timer0 in 16-bit mode. (Calculations only, no code needed).

4 -This digital circuit (image attached) is a: Choose an option:A. asynchronous counter from 0 to 5.B. synchronous counter from 0 to 6.C. 4-bit serial input shift register.D. asynchronous decade counter.E. modulo counter 8.

Note: Please do not handwritten.

Discuss the role of VRMs (Voltage Regulator Modules) on a motherboard and their impact on CPU overclocking and stability.

Discussion: 1. Explain what happens when the instruction sequence below is executed. LAHF MOV [BX+DI] , AH 2. What operation is performed by the instruction sequence that follows? MOV AH, [BX+SI] SAHF 3. What instruction should be executed to ensure that the carry flag is in the set state ? the reset state? 4. Which instruction when executed disables the interrupt interface?

1- Identify the addressing mode for: MOV CX, [1234] 2-The instruction that subtracts 1 from the contents of the specified register/memory location is a. INC b. SUBB C. SUB d. DEC

Provide the instructions needed to write one byte of data to an I/O register for the ATmega2560 in the 1) standard and         2) extended I/O register sections.

2. In the NUCLEO-F401RE board, user LED (green one) is connected to PA.5(GPIOA and pin 5), the Bule user button is connected to PC.13(GPIOC and pin 13). Using this information, write a sequence of C instructions that would do the following. a. Configure the GPIO pin connected to the Green LED as an output. b. Write a 1 to the pin to turn on the Green LED by writing to the output data register (ODR) of that GPIO port. c. Configure the GPIO pin connected to the push button as an input. d. Read the state of the button by reading the input data register (IDR) of that GPIO port. Notes: provide the segments of your codes. You do not need to provide an entire declaration of GPIOX address and related registers struct of the GPIO (we assume they are already declared). For example, if you want to read the input data for pin 15 of GPIOC, the following code is sufficient: int a GPIOC->IDR & (1 << 15);

The microprocessor unit that responsible for instruction queuing is .. O EU O ALU BIU O Segment registers O None of the above

What is the use of stack in micro-processor 8086?