lec11 - REGISTERS Sequential circuit used to store binary...

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Unformatted text preview: REGISTERS Sequential circuit used to store binary word Consists of a set of flip-flops (each flip-flop stores one bit of information) External gates may be used to control the inputs of the flip-flops: that is when and how new binary informa- tion is transfered to the flip-flops All flip-flops of the register are triggered by the same clock pulse All registers are built by flip-flops that are sensitive to pulse transition rather than pulse duration The flip-flops in a register are all of the same type 1 Registers (continued) 4-bit Register with D Flip-flops 2 Loading Transfer of new binary information into a register Serial load: (transfer in serial mode) Transfer of new binary information into a register bit by bit (# of clock pulses needed to load the register = # of flip- flops in the register) Parallel load: (transfer in parallel mode) Transfer of new binary information into a register as a whole word (# of clock pulses needed to load the register = 1) Unique master clock supplies clock pulses to all flip-flops and registers in the computer Problem: What to do if we do not want to change the contents of a master-clocked register ?...
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This note was uploaded on 10/27/2010 for the course EE Electronic taught by Professor Ortiz during the Spring '10 term at The University of Texas at San Antonio- San Antonio.

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lec11 - REGISTERS Sequential circuit used to store binary...

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