the drs4 start to generate Dtap signal after reset and standard configuration.
while in reset Denable and Dwrite are low
after reset we put Denable in high
the Dtap starts to toggle, and the plllck stabilizes on about 1V.
After 40Msec the Dtap stops to toggle and the plllck go to 2.5V
Why do the Domino stop working?