Microcontrollers

Write the steps required for programming 8051 to transfer data serially.

Explain MOVCA, @A+DPTR.

Explain DAA.

Explain MUL AB.

Distinguish between RISC and CISC Architecture.

Distinguish between Microprocessor and Microcontrollers

Explain the bits of SCON register.

Draw the Pin diagram of 8255 and briefly explain the signals.

Write an assembly program to generate a waveform with ON time of 7 msec and OFF time of 21 msec on P0.5. Assume XTAL of 11.0592MHz. Use timer 0.

Explain the architecture of MSP430 with a neat diagram.

Explain Registers and peripherals included on chip of MSP430 CPU.

What are the features that make MSP430 suitable for Low-power and portable applications?

Explain the 4 modes of operation 8255 along with control word format.

Write an 8051 C program to send to two messages "Normal speed" and "High speed" to the serial port. Assuming that SW (switch) is connected to pin P2.0, monitor its status and set the baud rate as follows: SW=0; 28,800 baud rate, SW=1 ; 56 K baud rate Assume that XTAL= 11.0592 MHz for both cases.

Briefly discuss the features of 8051 Microcontroller.

What are external interrupts? Draw the diagrams for activation of external interrupts. How level triggered interrupts are reset? How to set the two external interrupts as edge triggered interrupts?

switch is connected to pin PI.2. write an 8051 C program to monitor SW and create the following frequencies on pin PI.7 SW-0: 500 Hz, sw-1 ; 750 Hz .Use timer:0, mode 1 for both Use timer mode 1 for of them.

What is the difference between timer and counter? Explain the function of each bit in TMOD.

Draw the block diagram to show how 8031 is connected to DAC 0808 at port , using O/P buffer for DAC. Write an 805 program to generate ramp, signal.

Interface 4 x 4 keyboard to 805! and explain how scanning and identifying the key pressed done.

Discuss the features of 4 I/0 ports of 8051.

Write an ALP to toggle all bits of Pl every 200ms. Assume that the crystal frequency is1 1.0592MHz of 8051.

Write an ALP in 8051 to find the largest number among the , 8 bit number stored in internal RAM.

What are assembler directives? Explain the functions of the assembler directives DB, EQU,END, ORG.

What is a stack? Explain with examples, the PUSH and POR Instructions.

Explain the different addressing modes of 8051. Give an example for each one of them.

With the help of a diagram, explain how to interface 8KB EPROM and 8KB RAM to 8051 Microcontroller.