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Honored Contributor
12 years agoI want to capture the LVDS_A_CK with the clock INT_IOCLKA generated by PLL following the timing in the visio.So I do the timing constraints as follows.
set_max_delay -from {LVDS_A_CK} -to {LVDSRxTop:u_LVDSRxTop|lvds_rx:u_lvds_rx0|r_LVDSClk[0]} [expr 1.099 + 2.197] set_min_delay -from {LVDS_A_CK} -to {LVDSRxTop:u_LVDSRxTop|lvds_rx:u_lvds_rx0|r_LVDSClk[0]} [expr 1.099 - 2.197] 2.197 is the half of Cycle of INT_IOCLKA,and 1.099 is the shift phase value of INT_IOCLKA. Are the timing constraints right?