diff --git a/spiOverJtag/constr_xc6s_ftg256.ucf b/spiOverJtag/constr_xc6s_ftg256.ucf
new file mode 100644
index 0000000..7de5330
--- /dev/null
+++ b/spiOverJtag/constr_xc6s_ftg256.ucf
@@ -0,0 +1,8 @@
+CONFIG VCCAUX = "2.5";
+
+NET "sdi_dq0"  LOC = T10 | IOSTANDARD = LVCMOS33;
+NET "sdo_dq1"  LOC = P10 | IOSTANDARD = LVCMOS33;
+NET "wpn_dq2"  LOC = N12 | IOSTANDARD = LVCMOS33;
+NET "hldn_dq3" LOC = P12 | IOSTANDARD = LVCMOS33;
+NET "csn"      LOC = T3  | IOSTANDARD = LVCMOS33;
+NET "sck"      LOC = R11 | IOSTANDARD = LVCMOS33;