MICROPROCESSOR & MICROCONTROLLER LAB MANUAL ADDITION OF TWO 8 – BIT NUMBERS AIM: To perform addition of two 8 – bit numbers using 8051 instruction set. The starting address of the program is taken as 2000. One is unpacked BCD number and the other is packed BCD numbers.Binary Coded Decimal Numbers … it can perform operations on 8 – bit data. Intel first produced a microcontroller in 1976 under the name MCS-48, which was an 8 bit microcontroller. Timers and counters. Therefore, the OV flag is set to alert the program that the result is out of range. 8 – Bit ALU: ALU or Arithmetic Logic Unit is the heart of a microcontroller. It performs arithmetic and bitwise operation on binary numbers. Write an 8051 assembly language program to multiply two 8-bit numbers kept in the external RAM addressed by 4000H and 4001H respectively. Binary representation of 0 to 9 is called BCD. 8051 code to find a number is even or odd; 8051 code to find number of zeros and ones in a given number...!! The ALU in 8051 is an 8 – Bit ALU i.e. 8051 program to add two 8 bit numbers and store the result at external memory location 2050H. ALGORITHM: 1. Clock circuit of 8051; 8051 program to count the number of 1’s & 0’s in a number; Microcontroller Program to generate a square wave of 10 Hz at pin P1.0 of 8051 using timer 8051 Microcontroller Features. Counters and Timers in 8051 microcontroller contain two special function registers: TMOD (Timer Mode Register) and TCON (Timer Control Register), which are used for activating and configuring timers and counters.. Timer Mode Control (TMOD): TMOD is an 8-bit register used for selecting timer or counter and mode of timers. 8051 Program to add two 16 bit Numbers (AT89C51) Microcontroller; 8051 code find sum of first N natural numbers Write an 8051 C program to toggle bits of P1 continuously with a 250 ms delay. Lower 4-bits are used for … The most popular microcontroller 8051 belongs to the MCS-51 family of microcontrollers by Intel. represented by an 8-bit signed number. Store the result in the external RAM beginning from 6000H. The interpretations of unsigned and signed ADD and SUBTRACT operations are performed by the programmer. The register A(Accumulator) is used as one operand in the operations. There are seven registers R0 – R7 in different register banks. For example, consider adding two 8-bit numbers, A and B (A= FF 16 and B= FF 16 ) using the ADD instruction by a computer as follows: When the above addition is interpreted as an unsigned operation by the programmer, the result will be Later in 1980 they released a further improved version (which is also 8 bit), under the name MCS-51. Example – Algorithm – Load the first number from memory location 2050 to accumualtor. ‡ The 8051 (like all microcontrollers), carries out a number of operations, such as reading from ROM and updating the parity bit, during what is … Address Label Mnemonic Comment 8000 MOV R1,#12 MOV R2,#34 MOV R3,#56 2. Write an ALP to add two 2 byte numbers. In computer language there are two terms used for BCD numbers. Microcontroller 8051 Lab Manual VENKATASWAMY R www.venkataswamy.page.tl EEE, SJCE, MYSORE 9 11. Here we will see how to subtract two 8-bit numbers using this microcontroller. SECTION II - BINARY CODED DECIMAL NUMBER SYSTEM IN 8051:BCD Binary Coded Decimal number is used to represent the digital 0 to 9 for number, not binary or hex numbers. Problem – Write an assembly language program to add two 8 bit numbers stored at address 2050 and address 2051 in 8085 microprocessor.

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