1 files changed, 5 insertions, 0 deletions
diff --git a/ice40/chip.h b/ice40/chip.h
index cedc89b6..760ef3b1 100644
--- a/ice40/chip.h
+++ b/ice40/chip.h
@@ -586,6 +586,11 @@ struct Chip
     bool checkPipAvail(PipId pip) const
     {
         assert(pip != PipId());
+        if (args.type == ChipArgs::UP5K) {
+            int x = chip_info.pip_data[pip.index].x;
+            if (x == 0 || x == (chip_info.width - 1))
+                return false;
+        }
         return !switches_locked[chip_info.pip_data[pip.index].switch_index];
     }