1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: I Cant Understand this mux implementation

  1. May 4, 2008 #1
    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 [Broken]

    i cant 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 couldnt 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????????
    Last edited by a moderator: May 3, 2017
  2. jcsd
  3. May 4, 2008 #2
    Hi Galactic, where is the ckt n prog table? instead i watch some .... :-(
  4. May 4, 2008 #3
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook