mercury_xu5: reduce cmd_latency to fix problems with DRAM leveling

2020-11-20 15:31:47 +01:00 · 2020-11-20 15:31:47 +01:00 · ce38cff41d
parent a2f3add24e
commit ce38cff41d
1 changed files with 2 additions and 1 deletions
--- a/litex_boards/targets/mercury_xu5.py
+++ b/litex_boards/targets/mercury_xu5.py
@ -73,7 +73,8 @@ class BaseSoC(SoCCore):
            self.submodules.ddrphy = usddrphy.USPDDRPHY(platform.request("ddram"),
                memtype          = "DDR4",
                sys_clk_freq     = sys_clk_freq,
-                iodelay_clk_freq = 500e6)
+                iodelay_clk_freq = 500e6,
+                cmd_latency      = 0)
            self.add_csr("ddrphy")
            self.add_sdram("sdram",
                phy                     = self.ddrphy,