Reconfig PLL in ALTMEMPHY

Hi,

I always use ALTPLL of MegaWizard to create PLL for my design. But now, I use ALTMEMPHY for DDR interface. There is a PLL reconfiguration Interface and some pins that I am not clear such as:

- pll_reconfig_write_param

- pll_reconfig_read_param

- pll_reconfig_counter_type

- pll_reconfig_counter_param

- pll_reconfig_data_in

...

I have refered ALTPLL_RECONFIG user guide. But I hardly understand it.

Can you explain me more. (what is purpose of these pins? If I set all of them default value (0), the PLL run well? )

Thanks for any help. I'm a new in PLL design.