17/3/2014
40
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
0
0
A latch cannot read another data item until
the successor has captured the current one
CE-653 - De-Synchronisation Methodology