Dual Data Rate DDR Input Logic Improved with Random Input 555 timer

233

01:43:24

Capture data at double rate on rising and falling edges.  Q0 captures D at 0 degrees, Q1 captures D at 180 degree phase.
Using 555 instead of pulse train.  Added counter for phase ( 0 , 1 ) and data value (  0, 1, 2, 3 )

published 4 years ago

Redstone_guy

4 years ago

Circuit simply cannot be simulated until an error in said circuit has been fixed

MisterSparkle

4 years ago

Try adjusting times on 555, logic delay, and pulse train... I also had to quit and restart everycircuit after changing, sometimes, to reset the sim. Thanks for your "feedback" (sic.) :D It's always welcome!

wyoelk

4 years ago

Only way I could get it to start was lower 555 supply to 1v, start simulator, increase voltage to 5v or greater.

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