Explain register transfer language with example


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The symbolic notation used to describe the microoperation transfer among register is called register transfer language.


R1 = R2 + R3

R1 ← R1 + R3

microoperation Register Transfer Language (RTL)

We designated computer registers by capital letters to denote its function. For example program counter register is designated by PC and instruction register by IR.

The individual flip-flops in an register are numbered in sequence from 0 to n-1 as shown in figure below:-

Register R1
7 6 5 4 3 2 1 0

Showing Individual bits

  • We designate information transfer from one register to another by R2 ← R1
  • This implies that the outputs of source must have a path to the inputs of the destination.
  • The destination register has a parallel load capability.
  • It is assumed that all the transfer occurs during a clock edge transmission
  • All the microoperations written on a single line are to be executed at the same time.
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