Interface transition table


write mode:

lsin  rsin  full    lsout  rsout  full
-----------------------------------------
  0     0    0        0      0     0
  0     0    1        0      0     0
  0     1    0        1    hold    1
  0     1    1        1    hold    1
  1     0    0        0      1     0
  1     0    1        0      1     0
  1     1    0        1    hold    1
  1     1    1        1    hold    1


read mode:

lsin  rsin  full    lsout  rsout  full
-----------------------------------------
  0     0    0        0      0     0
  0     0    1        0      0     0
  0     1    0        1      0     0
  0     1    1        1      0     0
  1     0    0      hold     1     1
  1     0    1      hold     1     1
  1     1    0      hold     1     1
  1     1    1      hold     1     1