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Shift register. A shift register is a type of digital circuit using a cascade of flip-flops where the output of one flip-flop is connected to the input of the next. They share a single clock signal, which causes the data stored in the system to shift from one location to the next. By connecting the last flip-flop back to the first, the data can ...
A Spartan FPGA from Xilinx. A field-programmable gate array (FPGA) is a type of configurable integrated circuit that can be repeatedly programmed after manufacturing. FPGAs are a subset of logic devices referred to as programmable logic devices (PLDs). They consist of an array of programmable logic blocks with a connecting grid, that can be ...
A SR latch (R1, R2 = 1 kΩ; R3, R4 = 10 kΩ) In electronics, flip-flops and latches are circuits that have two stable states that can store state information – a bistable multivibrator. The circuit can be made to change state by signals applied to one or more control inputs and will output its state (often along with its logical complement too).
Lookup table. In computer science, a lookup table (LUT) is an array that replaces runtime computation with a simpler array indexing operation, in a process termed as direct addressing. The savings in processing time can be significant, because retrieving a value from memory is often faster than carrying out an "expensive" computation or input ...
In digital electronics, especially computing, hardware registers are circuits typically composed of flip-flops, often with many characteristics similar to memory, such as: [citation needed] The ability to read or write multiple bits at a time, and. Using an address to select a particular register in a manner similar to a memory address.
In general, a logic block consists of a few logic cells (each cell is called an adaptive logic module (ALM), a logic element (LE), slice, etc.). A typical cell consists of a 4-input LUT, a full adder (FA), and a D-type flip-flop (DFF), as shown to the right. The LUTs are in this figure split into two 3-input LUTs.
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