Flashcards
Digital and Embedded systems - Programmable logic
Cards in this deck (14)
- 1what is a PLD draw what it looks like1) It is a programmable logic device, it uses and or gates
Inputs are fed into the AND array, which is then fed into an OR array. - 2List the 6 advantages of using a PLD-less board space
-faster
-low power consumption
-cheaper assembly
-highly reliable
-free software available - 3what is the symbols for AND and OR gates in a PLD
- 4What are the 3 types of PLD'sPROM (programmable read only memory )
PAL (programmable array logic)
PLA (programmable logic array) - 5Explain the operation of PROM- it has a fixed AND array
-it has programmable OR gates
- 6Explain the operation of PAL-It has programmable AND array
-it has Fixed OR array
- 7Explain the operation of PAL-It has both programmable AND array and OR array
- 8how does a PLA work?The AND & OR gates inside are 'fused' until programmed by the user, using boolean functions.
-it uses a group of K AND gates each of 2n inputs
- 9what does CPLD stand for? what is it?Complex programmable logic device
-Contains multiple blocks of PLD's connected together using a global interconnection matrix
-Each block can be programmed as can the Global matrix - 10Draw a CPLD
- 11what are the types of FPGA's?1. Programmable logic structure,
2. Programmable routing structure
3. Programmable Input/Output (I/O). - 12what is a Programmable logic structure?its a 2 dimensional array of configurable logic block (clb)
- 13what is a Programmable routing structure ?they allow for flexible interconnection of CLB's
- 14what is Programmable Input/Output (I/O)?they are mainly buffers input, output or in/outputs
they allow the pins of the FPGA to function.
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- digital and embedded systems - Programmable logic exam prep
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- Steven Pearson
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