From 550f9c62e450d8b5982dffb034afe8122aa3a8a0 Mon Sep 17 00:00:00 2001 From: Jean THOMAS Date: Mon, 3 Aug 2020 13:27:04 +0200 Subject: ecpix5: add termination attributes to DDR3 signals --- nmigen_boards/ecpix5.py | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'nmigen_boards/ecpix5.py') diff --git a/nmigen_boards/ecpix5.py b/nmigen_boards/ecpix5.py index 50c2616..8f0bf7a 100644 --- a/nmigen_boards/ecpix5.py +++ b/nmigen_boards/ecpix5.py @@ -68,8 +68,10 @@ class _ECPIX5Platform(LatticeECP5Platform): Subsignal("cas", PinsN("P2", dir="o")), Subsignal("a", Pins("T5 M3 L3 V6 K2 W6 K3 L1 H2 L2 N1 J1 M1 K1", dir="o")), Subsignal("ba", Pins("U6 N3 N4", dir="o")), - Subsignal("dqs", DiffPairs("V4 V1", "U5 U2", dir="io"), Attrs(IO_TYPE="SSTL135D_I")), - Subsignal("dq", Pins("T4 W4 R4 W5 R6 P6 P5 P4 R1 W3 T2 V3 U3 W1 T1 W2", dir="io")), + Subsignal("dqs", DiffPairs("V4 V1", "U5 U2", dir="io"), + Attrs(IO_TYPE="SSTL135D_I", TERMINATION="OFF", DIFFRESISTOR="100")), + Subsignal("dq", Pins("T4 W4 R4 W5 R6 P6 P5 P4 R1 W3 T2 V3 U3 W1 T1 W2", dir="io"), + Attrs(TERMINATION="75")), Subsignal("dm", Pins("U4 U1", dir="o")), Subsignal("odt", Pins("P3", dir="o")), Attrs(IO_TYPE="SSTL135_I") -- cgit v1.2.3