diff --git a/src/main/scala/backBoard/shin/SpiInterface.scala b/src/main/scala/backBoard/shin/SpiInterface.scala
index 208cdbc..74339b5 100644
--- a/src/main/scala/backBoard/shin/SpiInterface.scala
+++ b/src/main/scala/backBoard/shin/SpiInterface.scala
@@ -176,7 +176,7 @@ class QSpiInterface(edge: Boolean) extends SpiInterfaceBase{
   sck       := qspi.sck
   csn       := qspi.csn
   qspi.miso := exRego(7, 4)
-  qspi.isDirIn := ~isSpiRead
+  qspi.isDirIn := ~isSpiRead & byteSel >= 4.U