17/3/2014
47
A
B
C
D
A+                   B-                    C+                   D-
A-                    B+                   C-                    D+
A+                   B-                    C+                   D-
A-                    B+                   C-                    D+
A+                   B-                    C+                   D-
0
0
1
0
A latch cannot become opaque before having
captured the data item from its predecessor
CE-653 - De-Synchronisation Methodology