I Cant Understand this mux implementation

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SUMMARY

The discussion focuses on implementing an 8-to-1 multiplexer (MUX) using 2^3x4 and 2^3x1 programmable read-only memories (PROMs). The user expresses confusion regarding the circuit design, particularly the role of the chip select input and the independent connections of the select line (s0) to each PROM. Despite tracing the circuit manually, the user struggles to comprehend the logic behind the output selection based on the input patterns.

PREREQUISITES
  • Understanding of digital logic design principles
  • Familiarity with multiplexer (MUX) functionality
  • Knowledge of programmable read-only memory (PROM) architecture
  • Basic circuit tracing and analysis skills
NEXT STEPS
  • Study the operation of 8-to-1 multiplexers in detail
  • Learn about the configuration and programming of PROMs
  • Explore circuit design techniques for implementing multiplexers with chip select inputs
  • Review examples of digital circuit analysis to improve tracing skills
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Electronics students, digital circuit designers, and engineers working with programmable logic devices who need to understand complex multiplexer implementations.

transgalactic
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i need to implement a 8-1 MUX using 2^3X4 and 2^3X1 proms

where there is a chip select input in the MUX

here is the solution of the circuit and the programming tables


http://s290.photobucket.com/albums/ll279/t...=IMG_8816-1.jpg

i can't understand this circuit
there is s0 that goes in every prom independently
there is a chip select input inside of the "main prom"

i tried to trace out the way it works with pencil and paper
but this this really tough to understand

i couldn't get this pattern like in ordinary mux
that if we take s0=0 s1=0 s2=1 then take I1
eventually i got to the right answers
but i coudnt understand why?
 
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Hi Galactic, where is the ckt n prog table? instead i watch some ... :-(
 

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