diff --git a/xc7/picorv32.pcf b/xc7/picorv32.pcf
new file mode 100644
index 00000000..499b965d
--- /dev/null
+++ b/xc7/picorv32.pcf
@@ -0,0 +1,3 @@
+NET "clk" PERIOD = 8 nS ;
+PIN "clk_pin" = BEL "clk.PAD" PINNAME PAD;
+PIN "clk_pin" CLOCK_DEDICATED_ROUTE = FALSE;