cancel
Showing results for 
Search instead for 
Did you mean: 
Highlighted
Explorer
Explorer
823 Views
Registered: ‎01-18-2011

delay element for OUTPUT_PHASE_90

Hello,

 

What delay element is used for phase shift when attribute OUTPUT_PHASE_90 = true?

0 Kudos
2 Replies
Highlighted
Community Manager
Community Manager
817 Views
Registered: ‎08-08-2007

Re: delay element for OUTPUT_PHASE_90

The OUTPUT_PHASE_90 is done via the quarter delays which is a part of the Step 2 of the BSC calibration 

 

From UG 571

 

"This step walks through the input and/or output delay of each used bit slice to calculate the number of taps required to provide the delay requested by DELAY_VALUE attribute. These calculated delay taps are stored in the RIU registers (ODELAYxx and IDELAYxx).The same is done for the BITSLICE_CONTROL available quarter delay lines (PQTR/NQTR) to provide the 90-degree equivalent delay when RX_CLK_PHASE_P(N) = SHIFT_90. These
values are stored in the RIU PQTR and NQTR registers."

Thanks,
Sandy

-------------------------------------------------------------------------
Don’t forget to reply, kudo, and accept as solution.
-------------------------------------------------------------------------
Highlighted
Explorer
Explorer
812 Views
Registered: ‎01-18-2011

Re: delay element for OUTPUT_PHASE_90

PQTR/NQTR is used for both RX_CLK_PHASE_P(N) and OUTPUT_PHASE_90? UG 571 says only about RX_CLK_PHASE_P(N).

0 Kudos