LECT#7 - EE200 DIGITAL LOGIC CIRCUIT DESIGN Class Notes...

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EE200(class 13-3) Prof. M.M. Dawoud 130 EE200 DIGITAL LOGIC CIRCUIT DESIGN Class Notes CLASS 13-3 The material covered in this class will be as follows: Introduction to registers and counters. Register with parallel load. Shift registers. Serial transfer. Serial addition. Introduction to Registers and Counters Registers and counters are practical examples of clocked sequential circuits. A register consists of a group of flip-flops each is capable of storing one bit of information. Logic gates could be used to arrange the loading of the register with data and reading of the contents. Counters may be considered as a special register, which counts in a certain count cycle determined by the design of the counting register. A Simple 4-Bit Register The following diagram shows a 4-bit register consisting of D flip- flops. A 3 I 0 I 1 I 2 I 3 A 2 A 1 A 0
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EE200(class 13-3) Prof. M.M. Dawoud 131 4-Bit Register with Parallel Load The next state of the D flip-flop is equal to the D input. In order to keep the contents of the register unchanged while the clock pulses are applied, then the output is applied back to the D input when the load input is zero. When we want to load the register
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LECT#7 - EE200 DIGITAL LOGIC CIRCUIT DESIGN Class Notes...

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