8051 Addition of 16-bit Numbers

-

 

Addition of two 16-bit Numbers in 8051

The instruction ADDC (add with carry) is used for 16-bit addition. When adding two 16-bit data operands, we need to be concerned with the propagation of a carry from the lower byte to the higher byte.

Program to add 2 16-bit numbers 3CE7H and 3B8DH.
ORG 0H
MAIN :
CLR A; clear accumulator
CLR C; clear carry flag
MOV A, #0E7H
ADD A, #8DH
MOV R6, A; save the low byte of sum
MOV A, #3CH
ADDC A, #3BH
MOV R7, A; save the high byte of sum
END; end of asm source file

Comments

Post a Comment

Popular posts from this blog

Alternating Current

-
Image
  What Is Alternating Current? An  alternating current  can be defined as a current that changes its magnitude and polarity at regular intervals of time. It can also be defined as an electrical current that repeatedly changes or reverses its direction opposite to that of Direct Current or DC, which always flows in a single direction as shown below From the graph, we can see that the charged particles in AC tend to start moving from zero. It increases to a maximum and then decreases back to zero completing one positive cycle. The particles then reverse their direction and reach the maximum in the opposite direction after which AC again returns to the original value completing a negative cycle. The same cycle is repeated again and again. Alternating currents are also accompanied usually by alternating voltages. Besides, alternating current is also easily transformed from a higher voltage level to a lower voltage level.
Read more

SOLAR TRANSFORMERS

-
Image
  The transformers required for wind power and solar DPV require special design features to meet the challenging operating conditions. The industry today has developed different types of transformers for the application. The last few decades have seen very rapid development of renewable energy, especially, distributed photovoltaic (DPV) and wind power. It is estimated that at least 40 per cent of electricity generation by year 2040 would be from renewable energy sources and this would give appreciable reduction of the present level of carbon dioxide emissions of about 10 billion tons per year. The transformer industry is rising to this challenge and has developed special transformers for the DPV generation and wind generation. Transformers are critical components in solar energy production and distribution. Historically, transformers have ‘stepped-up’ or ‘stepped-down’ energy from non-renewable sources. There are different types of solar transformers including distribution, station, su
Read more