Found 558 Questions for Microprocessor

Difference Between Multiprocessor and Multicomputer

AmitDiwan
Updated on 24-Apr-2021 07:26:33
In this post, we will understand the difference between multiprocessor and multicomputer −MultiprocessorIt consists of multiple processors within a single computer.It is a singly shared memory that is attached to the elements being processed.It is necessary for the processing elements to communicate with each other.It is a dynamic network.Example of multiprocessor is a sequent symmetry S-81.MulticomputerIt is an interlinked multiple autonomous computer.The memory attached to the processing elements are distributed in multiples.It is not required for elements being processed to communicate.It is a type of static network.Example of a multicomputer is a message passing multicomputer.Read More

Differences between 8086 and 8088 microprocessors

Nitin Sharma
Updated on 09-Jun-2020 07:59:32
Both 8086 and 8088 microprocessors are widely used in the embedded industry due to their various important and unique features.On the basis of nature of both of the microprocessors we can distinguish between 8086 and 8088 microprocessors as follows −Sr. No.Key808680881Data and Address BusIn case of 8086 MPU the data bus is of 16 bits and the address bus is of 20 bits.On other hand in 8088 MPU the data bus is of 8 bits and the address bus is of 20 bits.2Processing8086 has 3 available clock speeds (5 MHz, 8 MHz (8086-2) and 10 MHz (8086-1)).On other hand in ... Read More

Data memory structure of 8051 Microcontroller

Arnab Chakraborty
Updated on 09-Oct-2019 08:19:57
Here we will see the data memory structures of 8051 microcontroller. The internal data memory of 8051 is divided into two groups. These are a set of eight registers, and a scratch pad memory. These eight registers are R0 to R7. The address range 00H to 07H is used to access the registers, and the rest are scratch pad memory.8051 Provides four register bank, but only one register bank can be used at any point of time. To select the register bank, two bits of PSW (Program Status Word) are used.So the following addressing can be used to select register ... Read More

Address registers of 8257 chip

Arnab Chakraborty
Updated on 09-Oct-2019 08:15:54
Here we will see the address registers of 8257 chip.Every DMA channel consists an address register and a count register. These registers are 16-bits wide in length. In each 16 bits there are four ARs marked as AR3-0. Apart from four CRs there are control and status registers also. They are separate 8-bit registers, but have the same address. Here the processor can only write in the control register but we can read in the status register.We can select any one of the above registers by the address of the four pins marked as A3-0 of 8257. The processor used here ... Read More

RAM Addressing of 8051 Microprocessor

Arnab Chakraborty
Updated on 06-Jul-2020 09:27:15
In this section we will see how external RAM memories can be addressed by the Intel 8051 microcontroller. There are different methods for addressing the RAMs. Now at first we will discuss about some different types of RAM memories in short.The RAM (Random Access Memory) is volatile memory. So when the power is cutting off to the RAM chip, it losses the data. RAMs are also known as RAWM (Read and Write Memory). There are basically three kinds of RAMs. These are SRAM (Static RAM), NV-RAM (Non-Volatile RAM) and DRAM (Dynamic RAM).Static RAMThe storage cell in Static RAM are made ... Read More

Program to Divide two 8 Bit numbers in 8051 Microprocessor

Arnab Chakraborty
Updated on 09-Oct-2019 08:01:21
Here we will see the division operation. This operation will be used to divide two 8-bit numbers using this 8051 microcontroller. The register A and B will be used in this operation. No other registers can be used for division. The result of the division has two parts. The quotient part and the remainder part. Register A will hold Quotient, and register B will hold Remainder.We are taking two number 0EH and 03H at location 20H and 21H, After dividing the result will be stored at location 30H and 31H.AddressValue …20H0EH21H03H …30H00H31H00H …Program      MOV R0, #20H ; set source address 20H ... Read More

Program to Multiply two 8 Bit numbers in 8051 Microprocessor

Arnab Chakraborty
Updated on 09-Oct-2019 07:59:02
Here we will see how to multiply two 8-bit numbers using this 8051 microcontroller. The register A and B will be used for multiplication. No other registers can be used for multiplication. The result of the multiplication may exceed the 8-bit size. So the higher order byte is stored at register B, and lower order byte will be in the Accumulator A after multiplication.We are taking two number FFH and FFH at location 20H and 21H, After multiplying the result will be stored at location 30H and 31H.AddressValue …20HFFH21HFFH …30H00H31H00H …Program      MOV R0, #20H ; set source address 20H to R0 ... Read More

Program to Subtract two 8 Bit numbers in 8051 Microprocessor

Arnab Chakraborty
Updated on 09-Oct-2019 07:57:00
Now, in this section we will see how to subtract two 8-bit numbers using 8051 microcontroller. The register A (Accumulator) is used as one operand in the operations. There are seven registers R0 – R7 in different register banks. We can use any of them as second operand.We are taking two number 73H and BDH at location 20H and 21H, After subtracting the result will be stored at location 30H and 31H.AddressValue …20H73H21HBDH …30H00H31H00H …Program      MOV R0, #20H ; set source address 20H to R0       MOV R1, #30H ; set destination address 30H to R1       ... Read More

Program to Divide two 8 Bit numbers in 8085 Microprocessor

Arnab Chakraborty
Updated on 09-Oct-2019 07:49:58
Here we will see 8085 program. This program will divide two 8-bit numbers using 8085 microprocessor.Problem Statement −Write an 8085 Assembly language program to divide two 8-bit numbers and store the result at locations 8020H and 8021H.Discussion −The 8085 has no division operation. To get the result of division, we should use the repetitive subtraction method.By using this program, we will get the quotient and the remainder. 8020H will hold the quotient, and 8021H will hold remainder.We are saving the data at location 8000H and 8001H. The result is storing at location 8050H and 8051H.InputThe Dividend: 0EHThe Divisor 04HThe Quotient will be ... Read More

Program to Subtract two 8 Bit numbers in 8085 Microprocessor

Arnab Chakraborty
Updated on 09-Oct-2019 07:47:46
Here we will see one 8085 program. In this program we will see how to subtract two 8-bit numbers.Problem Statement −Write an 8085 Assembly language program to subtract two 8-bit numbers and store the result at locations 8050H and 8051H.Discussion −In 8085, the SUB instruction is used 2’s complemented method for subtraction. When the first operand is larger, the result will be positive. It will not enable the carry flag after completing the subtraction. When the result is negative, then the result will be in 2’s complemented form and carry flag will be enabled.We are using two numbers at location 8000H and ... Read More
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