What are bidirectional shift registers?
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Bidirectional shift registers are the registers which are capable of shifting the data either right or left depending on the mode selected. If the mode selected is 1(high), the data will be shifted towards the right direction and if the mode selected is 0(low), the data will be shifted towards the left direction.
What is meant by parallel load of a shift register?
Parallel load means to load all flip-flops of a register at one time. Serial load means to load the flip-flop of a register one bit at a time. The number of clock pulses required to shift all bits of a register completely in or completely out of the register is equal to the number of flip-flops in the register.
What is shift register PPT?
Definition • A register is a digital circuit with two basic functions: Data Storage and Data Movement – A shift register provides the data movement function – A shift register “shifts” its output once every clock cycle • A shift register is a group of flip-flops set up in a linear fashion with their inputs and outputs …
Which register can be used for shifting and parallel load capability?
Universal shift register
A Universal shift register is a register which has both the right shift and left shift with parallel load capabilities. Universal shift registers are used as memory elements in computers.
What is meant by shift register explain 4-bit bidirectional shift register?
4 –bit Bidirectional Shift Register: Bidirectional shift register allows shifting of data either to left or to the right side. It can be implemented using logic gates circuitry that enables the transfer of data from one stage to the next stage to the right or to the left, depend on the level of control line.
What is universal register?
A Universal shift register is a register which has both the right shift and left shift with parallel load capabilities. Universal shift registers are used as memory elements in computers. A Unidirectional shift register is capable of shifting in only one direction.
What are the different types of shift registers?
Basic shift registers are classified by structure according to the following types:
- Serial-in/serial-out.
- Parallel-in/serial-out.
- Serial-in/parallel-out.
- Universal parallel-in/parallel-out.
- Ring counter.
What is a bidirectional shift register?
A bidirectional, or reversible, shift register is one in which the data can be shift either left or right. A four-bit bidirectional shift register using D flip-flops is shown below.
What is a 4-bit parallel in serial out shift register?
A four-bit parallel in- serial out shift register is shown below. The circuit uses D flip-flops and NAND gates for entering data (ie writing) to the register. D0, D1, D2 and D3 are the parallel inputs, where D0 is the most significant bit and D3 is the least significant bit.
What is a universal shift register?
Capable of shifting contents either left or right depending upon the signals present on appropriate control input lines. Universal shift register: Depending on the signal values on the select lines of the multiplexers, the register can retain its current state, shift right, shift left or be loaded in parallel.
What is the 74hc194 4-bit universal shift register?
The 74HC194 is a universal bi-directional shift register. It has both serial and parallel input and output capability. [Floyd] Figure 6.1:The 74HC194 4-bit bi-directional universal shift register