Description

Solution

The example below shows a possible setup time violation in MIG 7 Series 1.2. 

This path starts with CLKOUT2 (which is the sync_pulse) and ends at generation of MEMREFCLK. 

This is analyzed for one clock period which is 1.25 ns (800 MHz).

Path1
------------------------------------------------------- -------------------
PLLE2_ADV_X1Y8.CLKOUT2 Tpllcko_CLK 0.088 u_mig_7series_v1_2/u_ddr3_infrastructure/plle2_i
u_mig_7series_v1_2/u_ddr3_infrastructure/plle2_i
PHY_CONTROL_X1Y6.SYNCIN net (fanout=22) 1.530 u_mig_7series_v1_2/sync_pulse
PHY_CONTROL_X1Y6.MEMREFCLK Tpctcks_SYN 0.168 u_mig_7series_v1_2/u_memc_ui_top_std/mem_intfc0/phy_top0/u_mc_phy_wrapper/u_mc_phy/phy_4lanes_2.phy_4lanes/phy_control_i
u_mig_7series_v1_2/u_memc_ui_top_std/mem_intfc0/phy_top0/u_mc_phy_wrapper/u_mc_phy/phy_4lanes_2.phy_4lanes/phy_control_i
------------------------------------------------------- ---------------------------

Path2
------------------------------------------------------------- -------------------
PHY_CONTROL_X1Y8.PHYCTLEMPTY Tpctcko_EMP 0.576 u_mig_7series_v1_2/u_memc_ui_top_std/mem_intfc0/phy_top0/u_mc_phy_wrapper/u_mc_phy/phy_4lanes_0.phy_4lanes/phy_control_i
u_mig_7series_v1_2/u_memc_ui_top_std/mem_intfc0/phy_top0/u_mc_phy_wrapper/u_mc_phy/phy_4lanes_0.phy_4lanes/phy_control_i
PHY_CONTROL_X1Y6.PHYCTLMSTREMPTY net (fanout=3) 0.930 u_mig_7series_v1_2/u_memc_ui_top_std/mem_intfc0/phy_top0/u_mc_phy_wrapper/u_mc_phy/phy_ctl_empty<0>
PHY_CONTROL_X1Y6.MEMREFCLK Tpctckd_EMP 0.034 u_mig_7series_v1_2/u_memc_ui_top_std/mem_intfc0/phy_top0/u_mc_phy_wrapper/u_mc_phy/phy_4lanes_2.phy_4lanes/phy_control_i
u_mig_7series_v1_2/u_memc_ui_top_std/mem_intfc0/phy_top0/u_mc_phy_wrapper/u_mc_phy/phy_4lanes_2.phy_4lanes/phy_control_i
------------------------------------------------------------- ---------------------------

To resolve the timing errors, locate the following localparam in the 'user_design/rtl/phy_ddr_mc_phy.v' module:

localparam MASTER_PHY_CTL = 0;

• For customers using 3 banks, change this to a 1.
• For customers using 1 bank, leave this at 0.
• For customers using 2 banks, set this to either 0 or 1 depending on whether the address/control bank is located physically above or below the data bank.