Adding comment to iodelay_tap_average dictionary.

2018-08-08 13:31:11 -07:00 · 2018-08-08 13:31:11 -07:00 · 48230583b9
parent d986b60e03
commit 48230583b9
1 changed files with 1 additions and 1 deletions
--- a/litedram/phy/s7ddrphy.py
+++ b/litedram/phy/s7ddrphy.py
@ -76,7 +76,7 @@ class S7DDRPHY(Module, AutoCSR):
        iodelay_tap_average = {
            200e6: 78e-12,
            300e6: 52e-12,
-            400e6: 39e-12,
+            400e6: 39e-12, # Only valid for -3 and -2/2E speed grades
        }

        half_sys8x_taps = math.floor(tck/(4*iodelay_tap_average[iodelay_clk_freq]))