Categories: Processor

Registers In Microprocessor

What is register?

Register is a small high speed named memory. It consists of a set of binary storage cells called flip-flops with parallel reading or writing or both the facilities. The number of bits in a register depends on the type and address of the data.

Register plays a major role in CPU operations. Microprocessor picks up data from one of the registers for doing arithmetic or logical operation. Once the operation is over, it stores the result in a register. Data are usually loaded from memory to register. Similarly the resultant data will be loaded from registers to memory.

Examples

Accumulator
Program Counter
Status Register
Stack Pointer

Types of Registers

Registers are classified as follows.

  1. Registers Accessible to the Programmer
    1. General Purpose Register
    2. Special Purpose Register
  2. Registers Not Accessible to the Programmer
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