8/30/2011   X:\ESP\G3-ESP\Project.Drawings\EE.Drawings\prototyping\ConstantCurrentDrive\drive logic.txt
COMMENTS INPUT-EQN/TT MINIMIZE 

' E = Enable 1 = enabled
' Br = Brake 1 = Brake on
' Di = Direction 0 = Reverse 1 = Forward
' P = PWM 1 = Driven
' Pd = Delayed PWM 
' a = High-side Left Forward driver
' b = Low-side Left Reverse driver
' c = High-side Right Forward driver
' d = Low-side Right Reverse driver
(1) E Br Di P Pd : a b c d
    0 x x x x   1 0 1 0
    1 1 x x x   1 1 1 1
    1 0 0 0 0   0 0 0 0
    1 0 0 0 1   1 0 0 0
    1 0 0 1 0   1 0 0 0
    1 0 0 1 1   1 1 0 0
    1 0 1 0 0   0 0 0 0
    1 0 1 0 1   0 0 1 0
    1 0 1 1 0   0 0 1 0
    1 0 1 1 1   0 0 1 1
    ;

        a = not E or Br or not Di and P or not Di and Pd;

(2) E Br Di P Pd : a b c d
    0 x x x x   1 0 1 0
    1 1 x x x   1 1 1 1
    1 0 0 0 0   0 0 0 0
    1 0 0 0 1   1 0 0 0
    1 0 0 1 0   1 0 0 0
    1 0 0 1 1   1 1 0 0
    1 0 1 0 0   0 0 0 0
    1 0 1 0 1   0 0 1 0
    1 0 1 1 0   0 0 1 0
    1 0 1 1 1   0 0 1 1
    ;

        b = E and Br or E and not Di and P and Pd;

(3) E Br Di P Pd : a b c d
    0 x x x x   1 0 1 0
    1 1 x x x   1 1 1 1
    1 0 0 0 0   0 0 0 0
    1 0 0 0 1   1 0 0 0
    1 0 0 1 0   1 0 0 0
    1 0 0 1 1   1 1 0 0
    1 0 1 0 0   0 0 0 0
    1 0 1 0 1   0 0 1 0
    1 0 1 1 0   0 0 1 0
    1 0 1 1 1   0 0 1 1
    ;

        c = not E or Br or Di and P or Di and Pd;

(4) E Br Di P Pd : a b c d
    0 x x x x   1 0 1 0
    1 1 x x x   1 1 1 1
    1 0 0 0 0   0 0 0 0
    1 0 0 0 1   1 0 0 0
    1 0 0 1 0   1 0 0 0
    1 0 0 1 1   1 1 0 0
    1 0 1 0 0   0 0 0 0
    1 0 1 0 1   0 0 1 0
    1 0 1 1 0   0 0 1 0
    1 0 1 1 1   0 0 1 1
    ;

        d = E and Br or E and Di and P and Pd;


 (4) Boolean equations processed
  Processing time = 0.12 seconds