Applications of Encoder,Decoders, Multiplexors and Demultiplexors

• A Register is an example of sequential logic.
• An n bit register stores n bits b₀ through b_n-1
• Registers have
  • an input port (n bits wide)
  • an output port (n bits wide)
  • A clock port.
    • When the clock changes from low to high the data on the input port is stored in the register.
• A register will also have
  • A chip select line (or possibly a -cs line)
  • An clear line (or possibly a -clear line)
• a tkgate exmaple
• Note that the registers have three distinct delays
  • A data set up time
  • A data hold time
  • A Data available time.
• The example also contains an example of the register file.
  • An 8 bit data in line (WriteData)
  • An 8 bit data out line (Read Data 1)
  • An 2 bit write register address line (Write Register)
  • An 2 bit read register address line(Read Register 1)
  • A 1 bit register write line (RegWrite)
  • Plus a copule of maintenance lines.