02-27-2019 11:25 AM
I am reconfiguring MMCME2_adv with DRP ports. I am able to reconfigure four registers (all ClkReg1). Procedure for reconfiguring is as follows:
With the other five registers that I want to configure, four Clkreg2 and one Divreg, I am unable to read back register values exactly on reserved bits. Instead of values, Xs are received. Apart from reserved bits, I receive correct register values as expected.
Please advise why I am getting Xs in some registers and bit values on other registers. How to rectify this problem? Snapshot of simulation is attached.
02-28-2019 12:10 AM
I am able to reconfigure MMCME2_adv in spite of Xs on reserved bits of some registers. However, i will surely want to know why some registers behave differently.