Describe the Flag register of 8051 with its bit significance and the function of program counter and stack pointer.
[7 marks]Explain the timer operations in 8051.
[7 marks]Explain why does the microcontrollers are known as on-chip computers?
[7 marks]Discuss about status and control signals available on 8051.
[7 marks]Discuss the function of following pins: (1)EA/Vpp, (2) ALE, (3) RST, (4) XTAL1.
[7 marks]What do you mean by key bouncing? Explain hardware and software techniques to achieve key debouncing.
[7 marks]Describe IO Ports pin configurations along with suitable circuit diagram.
[7 marks]What do you understand by Implicit and Immediate addressing modes? Explain with suitable example. Also explain the demultiplexing of address and data buses.
[7 marks]Describe how does the serial communication can be established? And also discuss the role of SCON register.
[7 marks]Explain the interrupt sources available in 8051. Also explain IE and IP SFRs.
[7 marks]Draw and explain the interfacing of 4 X 4 matrix keyboard with 8051.
[7 marks]Discuss the functionality of following instructions: (1) DJNZ R1, Loop, (2) MOVX A, @DPTR, (3) MOVC A, A+@DPTR
[7 marks]Write a program to generate a square wave of 66% duty cycle on pin P1.5. Assume crystal frequency is 12 MHz.
[7 marks]Explain the hardware scheme to interface ADC 0808/0809 to 8051, which reads temperature on PORT1 and Display on PORT0, where seven segment LEDs are connected.
[7 marks]Write an assembly language program to transfer a block of 50 data bytes stored at D500 onwards to E500 onwards.
[7 marks]Discuss the hardware scheme to interface external 32K EPROM and 16K RAM memories with microcontroller.
[7 marks]Two 64- bit numbers stored at locations C500 and D000, add those numbers and store the result at D500 onwards.
[7 marks]