How many branch instructions are in the instruction set of 8051 Microcontroller?
How many branch instructions are in the instruction set of 8051 Microcontroller?
In 8051 Microcontroller there is 17 different instructions under the Logical Group. In total there are 46 opcodes. These instructions do not affect the flag bits but the CJNE affects the CY flag.
What is 8051 Microcontroller used for?
The 8051 Microcontroller is one of the basic type of microcontroller, designed by Intel in 1980’s. This microcontroller was based on Harvard Architecture and developed primarily for use in embedded systems technology.
Which are the data transfer instructions of 8051?
The 8051 microcontroller has an 8-bit opcode which gives it the ability to handle 2^8(255) instructions….List of data transfer instructions.
| Operation | Mnemonics | Description |
|---|---|---|
| Memory to register | XCH A, address | [A]<-[Address] |
| Register to memory | MOVX @Ri, A | [Address]<-[A] |
| MOV a8, A | [Address]<-[A] | |
| MOV a8, Rn | [Address]<-[Rn] |
What are different types of instructions?
Depending on operation they perform, all instructions are divided in several groups:
- Arithmetic Instructions.
- Branch Instructions.
- Data Transfer Instructions.
- Logic Instructions.
- Bit-oriented Instructions.
What is instruction in microcontroller?
The instruction set of microcontroller is a collection of instructions that the microcontroller is designed to execute.
Why microcontroller is used?
Microcontrollers are used in automatically controlled products and devices, such as automobile engine control systems, implantable medical devices, remote controls, office machines, appliances, power tools, toys and other embedded systems.
What are the features of 8051 microcontroller?
Features of 8051 Microcontroller
- 4KB bytes on-chip program memory (ROM)
- 128 bytes on-chip data memory (RAM)
- Four register banks.
- 128 user defined software flags.
- 8-bit bidirectional data bus.
- 16-bit unidirectional address bus.
- 32 general purpose registers each of 8-bit.
- 16 bit Timers (usually 2, but may have more or less)
What are the 3 types of instructions?
A computer must have the following types of instructions:
- Data transfer instructions.
- Data manipulation instructions.
- Program sequencing and control instructions.
- Input and output instructions.
How many timer is 8051?
two timers
The 8051 has two timers, Timer 0 and Timer 1. They can be used as timers or as event counters. Both Timer 0 and Timer 1 are 16-bit wide.
How many pins are there in 8051?
40 pins
8051 microcontroller was designed by Intel in 1981. It is an 8-bit microcontroller. It is built with 40 pins DIP (dual inline package), 4kb of ROM storage and 128 bytes of RAM storage, 2 16-bit timers.
