diff --git a/examples/partial_update/partial_update.ino b/examples/partial_update/partial_update.ino
index bffce6b..1907cba 100644
--- a/examples/partial_update/partial_update.ino
+++ b/examples/partial_update/partial_update.ino
@@ -73,7 +73,7 @@ void setup()
     DrawScene(i, 1); // new scene drawn to plane 1
     bbep.refresh(REFRESH_PARTIAL);
     bbep.wait();
-//    bbep.sleep(LIGHT_SLEEP);
+    bbep.sleep(LIGHT_SLEEP);
   } // for i
   delay(5000); // wait 5 seconds, then erase to white
   bbep.setPlane(0);
diff --git a/src/bb_ep.inl b/src/bb_ep.inl
index 4984ee3..65ff691 100644
--- a/src/bb_ep.inl
+++ b/src/bb_ep.inl
@@ -1448,9 +1448,11 @@ int bbepWritePlane(BBEPDISP *pBBEP, int iPlane)
     
     if (pBBEP == NULL || pBBEP->ucScreen == NULL || iPlane < PLANE_0 || iPlane > PLANE_DUPLICATE)
         return BBEP_ERROR_BAD_PARAMETER;
+    bbepSetAddrWindow(pBBEP, 0,0, pBBEP->native_width, pBBEP->native_height);
+
     if (pBBEP->chip_type == BBEP_CHIP_UC81xx) {
-        ucCMD1 = UC8151_DTM1;
-        ucCMD2 = UC8151_DTM2;
+        ucCMD1 = UC8151_DTM2;
+        ucCMD2 = UC8151_DTM1;
     } else {
         ucCMD1 = SSD1608_WRITE_RAM;
         ucCMD2 = SSD1608_WRITE_ALTRAM;