Register
- 1. WELCOME Name: Al Imran ID: 201015089 Section: EB Batch no: 201 Department of CSE Green University of Bangladesh Presentation Topic: Register COURSE TITLE: Computer Architecture COURSE CODE: CSE-211
- 2. • Registers • Basic Register • Shift Register • Bidirectional Shift Register with Parallel Load Outline
- 3. • Register is a very fast computer memory, used to storedata/instruction in- execution. A Register is a group of flip-flops with each flip-flop capable of storing one bit of information. ... A register consists of a group of flip-flops and gates. Registers
- 4. Basic registers are easy to build. We can store multiple bits just by putting a bunch of flip-flops together! A 4-bit register is shown on the right, and its internal implementation is below. This register uses D flip-flops it’s easy to store data without worrying about flip-flop input equations. All the flip-flops share a common CLK and CLR signal Basic register
- 5. A shift register “shifts” its output once every clock cycle. SI is an input that supplies a new bit to shift “into” the register. For example, if on some positive clock edge we have: SI = 1 Q0-Q3 = 0110 then the next state will be: Q0-Q3 = 1011 The current Q3 (0 in this example) will be lost on the next cycle. Shift register Q0(t+1) = SI Q1(t+1) = Q0(t) Q2(t+1) = Q1(t) Q3(t+1) = Q2(t)
- 6. A bidirectional shift register is one in which the data can be shifted either left or right. It can be implemented by using gate logic that enables the transfer of a data bit from one stage to the next stage to the right or to the left, depending on the level of a control line. Bidirectional shift register with parallel load
- 7. Bidirectional shift register with parallel load (cont.)