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-rw-r--r--usrp2/top/B100/timing.ucf9
1 files changed, 9 insertions, 0 deletions
diff --git a/usrp2/top/B100/timing.ucf b/usrp2/top/B100/timing.ucf
index b2a455f6d..96c47cf2c 100644
--- a/usrp2/top/B100/timing.ucf
+++ b/usrp2/top/B100/timing.ucf
@@ -3,3 +3,12 @@ TIMESPEC "TS_CLK_FPGA_P" = PERIOD "CLK_FPGA_P" 15625 ps HIGH 50 %;
NET "IFCLK" TNM_NET = "IFCLK";
TIMESPEC "TS_IFCLK" = PERIOD "IFCLK" 20833 ps HIGH 50 %;
+
+#constrain FX2 IO
+NET "GPIF_D<*>" MAXDELAY = 5.5 ns;
+NET "GPIF_CTL<*>" MAXDELAY = 5.5 ns;
+NET "GPIF_ADR<*>" MAXDELAY = 5.5ns;
+NET "GPIF_SLWR" MAXDELAY = 5.5 ns;
+NET "GPIF_SLRD" MAXDELAY = 5.5 ns;
+NET "GPIF_SLOE" MAXDELAY = 5.5 ns;
+NET "GPIF_PKTEND" MAXDELAY = 5.5 ns;