lpddr4/init: increase CA/DQ Vref to 30.4% (yields better results)

2021-03-19 11:34:56 +01:00 · 2021-03-19 11:34:56 +01:00 · 58235f478e
parent 693695f067
commit 58235f478e
1 changed files with 2 additions and 2 deletions
--- a/litedram/init.py
+++ b/litedram/init.py
@ -583,11 +583,11 @@ def get_lpddr4_phy_init_sequence(phy_settings, timing_settings):
        (4, 3, odt_map[ca_odt]),
    ])
    mr[12] = reg([
-        (0, 6, vref_ranges[1][27.2]),  # Vref(CA) 27.2% VDD2
+        (0, 6, vref_ranges[1][30.4]),  # Vref(CA) % of VDD2
        (6, 1, 1),  # range[1]
    ])
    mr[14] = reg([
-        (0, 6, vref_ranges[1][27.2]),  # Vref(DQ) 27.2% VDDQ
+        (0, 6, vref_ranges[1][30.4]),  # Vref(DQ) % of VDDQ
        (6, 1, 1),  # range[1]
    ])
    mr[13] = 0  # defaults (data mask enabled, frequency set point 0)