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1) The document discusses two types of counters: asynchronous and synchronous. 2) It provides two handouts, one asking to complete a timing diagram for a circuit, and another asking about designing a 32-bit ripple counter with a maximum frequency. 3) In summary, the document discusses different types and applications of counters in sequential logic design, how counters can increment or decrement, and methods for building counters from basic components or modifying existing counters.
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This document summarizes the key topics covered in a lecture on digital electronics basics, including:
- Logic gates (AND, OR, NOT) and their truth tables.
- Flip flops which can store one bit and have two stable states, including common types like SR, D, JK, and T flip flops.
- Clocked flip flops which only change state on the rising/falling edge of a clock pulse for synchronization.
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The document discusses declaration tables in SIMATIC S7. It explains that declaration tables are used to declare temporary variables that are stored in the local data stack while a block is executing. There are two types of variables - global and local. Local variables include temporary variables that exist only during block execution and static variables that are retained after block execution. The document provides an example program that uses input and output parameters declared in the declaration table to start and stop a motor. It also includes an exercise to write a program in FC5 to calculate an equation using declared variables and determine the value of K for given values of X, Y and Z.
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Shift Register
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Flipflops JK T SR D All FlipFlop Slides
Flipflops JK T SR D All FlipFlop Slides. Uploaded by SidRehmani.
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Shift Registers
Shift registers are digital circuits composed of flip-flops that can shift data from one stage to the next. They can be configured for serial-in serial-out, serial-in parallel-out, parallel-in serial-out, or parallel-in parallel-out data movement. Common applications include converting between serial and parallel data, temporary data storage, and implementing counters. MSI shift registers like the 74LS164 and 74LS166 provide 8-bit shift register functionality.
Shift registers
The document discusses various types of shift registers including serial-in serial-out (SISO), serial-in parallel-out (SIPO), parallel-in serial-out (PISO), and parallel-in parallel-out (PIPO) registers. It explains how data is entered and output from each type of register and provides examples of shift register applications such as time delay circuits, serial-to-parallel conversion, and keyboard encoding. Common shift register integrated circuits are also described including the 74HC195, 74HC165, and 74HC194.
Parallel adder
The document discusses parallel adders and subtractors. It describes a parallel binary adder as a circuit consisting of n full adders that adds n-bit binary numbers and outputs n sum bits and a carry bit, with the COUT of one full adder connected to the CIN of the next. It also mentions parallel binary adders for 2 and 4 bits, as well as a parallel binary subtractor.
Overview of Shift register and applications
Shift registers are used for temporary storage and can store multiple bits. There are two types: serial load and parallel load. Serial load registers shift data in or out one bit at a time on each clock cycle, while parallel load registers allow loading/output of all bits simultaneously. Common applications of shift registers include ring counters, Johnson counters, and pseudo-random pattern generators. A ring counter shifts data through the register and back to the first stage, counting through a fixed number of states. A Johnson counter also shifts data through the stages but with the last stage complement fed back to first, allowing it to count through more states than a ring counter.
Counters
This document provides information about different types of counters, including asynchronous counters, synchronous counters, MSI counters, and specific counter integrated circuits. It defines counters and describes their basic characteristics. It discusses asynchronous ripple counters and their timing. It provides examples of decade and binary counters. It describes synchronous counters and MSI counters like the 74LS163 4-bit synchronous counter. Finally, it provides truth tables, logic diagrams, and application information for common counter ICs like the 7490, 7492, 7493, and 74LS163.
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Shift register
Shift registers allow for storage and movement of digital data. They consist of flip-flops connected in a chain so the output of one becomes the input of the next. There are several types of shift registers including serial in-serial out, serial in-parallel out, parallel in-serial out, and parallel in-parallel out. Special shift registers also exist like bidirectional and counter shift registers.
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This document describes different types of synchronous counters that are triggered by a common clock signal. It discusses binary counters that count up in binary, up-down binary counters that can count up or down, BCD counters that count in decimal, and binary counters that can be parallel loaded. The key aspects covered are how the flip-flops are triggered in each counter type and the inputs and functions that control counting direction, clearing, loading, and counting.
Flipflop
Flip-flops are basic memory circuits that have two stable states and can store one bit of information. There are several types of flip-flops including SR, JK, D, and T. The SR flip-flop has two inputs called set and reset that determine its output state, while the JK flip-flop's J and K inputs can toggle its output. Flip-flops like the D and JK can be constructed from more basic flip-flops. For sequential circuits, flip-flops are made synchronous using a clock input so their state only changes at the clock edge.
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- 2. Tow types of counters Asynchronous synchronous 2
- 3. 3
- 4. Handout-1 4 Complete a timing diagram for this circuit,
- 5. Handout-2 1- Design MOD = 32 ripple counter knowing that time delay of each JK-FF is 10ns . What is the maximum frequency this counter can hard ? 5
- 6. Summary of Counters Counters serve many purposes in sequential logic design. There are lots of variations on the basic counter. Some can increment or decrement. An enable signal can be added. The counter’s value may be explicitly set. There are also several ways to make counters. You can follow the sequential design principles to build counters from scratch. You could also modify or combine existing counter devices.
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