8255 Programmable Peripheral Interface The parallel input-output port chip 8255 is also called as programmable peripheral input- output port. It has 24 input/output lines which may be individually programmed in  three groups of eight...

PIC (Programmable Interrupt Controller )architecture Programmable Interrupt Controller is used when several I/O devices transfer data using interrupt and they are to be connected to the same level of the microprocessor. List Basic Features...

Addressing Modes in 8051 1. Immediate addressing mode: In this type, the operand is specified in the instruction along with the opcode. In simple way, it means data is provided in instruction itself. Ex:...

The 8051 instruction set is divided into 4 functional groups, Arithmetic:   Addition: ADD – 8-bit addition between the accumulator (A) and a second operand. The result is always in the accumulator. The CY...

The program status word (PSW) register is an 8-bit register. It is also referred to as the flag register. Although the PSW register is 8 bits wide, only 6 bits of it are used...

Pin diagram of 8051 Features of 8051 Microcontroller All peripherals are integrated into a single chip, the overall system cost is very low. Simple to integrate in any electronic device. Simple architecture. Low computing...

The 8051 is an 8 – bit Microcontroller i.e. it can read, write and process 8 – bit Data. CPU is the brain of any processing device of the microcontroller. It monitors and controls...