diff --git a/src/main/java/fabrik/simulator/pic16f84/Commands.java b/src/main/java/fabrik/simulator/pic16f84/Commands.java
index 9679ed8..057798f 100644
--- a/src/main/java/fabrik/simulator/pic16f84/Commands.java
+++ b/src/main/java/fabrik/simulator/pic16f84/Commands.java
@@ -214,7 +214,7 @@ public class Commands {
                 return;
             case 0b01100011:
                 System.out.println("SLEEP");
-                //TODO
+                SLEEP();
                 addExecutionTime(1);
                 return;
             default:
@@ -222,8 +222,7 @@ public class Commands {
         }
 
         if (instruction == 0 || instruction == 0b0110000 || instruction == 0b01000000 || instruction == 0b00100000){
-            System.out.println("NOP");
-            addExecutionTime(1);
+            NOP ();
         }
         else{
             System.out.println("Nicht gefunden!");
@@ -232,10 +231,19 @@ public class Commands {
 
     }
 
+    public static void SLEEP() {
+        Controller_Frontend.sleep ();
+    }
+
     public static void RETFIE() {
         DataRegister.setPC(ProgramStack.pop());
     }
 
+    public static void NOP () {
+        System.out.println("NOP");
+        addExecutionTime(1);
+    }
+
     public static void GOTO(int jump) {
         DataRegister.setPC(jump-1);
     }
diff --git a/src/main/java/fabrik/simulator/pic16f84/Controller_Frontend.java b/src/main/java/fabrik/simulator/pic16f84/Controller_Frontend.java
index 47c6dcc..f03ab20 100644
--- a/src/main/java/fabrik/simulator/pic16f84/Controller_Frontend.java
+++ b/src/main/java/fabrik/simulator/pic16f84/Controller_Frontend.java
@@ -79,10 +79,18 @@ public class Controller_Frontend {
     private CheckBox wdtCheck;
 
     private static volatile boolean isAutoRunActive = true;
-
+    private static volatile boolean isSleeping = false;
 
     public static void stopRunFromBackend(){
         isAutoRunActive = false;
+        if (isSleeping)
+            isSleeping = false;
+        else
+            DataRegister.resetPC();
+    }
+
+    public static void sleep() {
+        isSleeping = true;
     }
 
     @FXML
@@ -153,8 +161,12 @@ public class Controller_Frontend {
         });
 
         // Befehle ausführen
-        Commands.decode(prog[DataRegister.getPC()]);
-        DataRegister.increasePC();
+        if (!isSleeping) {
+            Commands.decode(prog[DataRegister.getPC()]);
+            DataRegister.increasePC();
+        }
+        else
+            Commands.decode(0);
         WatchdogTimer.testAndTrigger();
         Table.refresh();
         Stage stage = (Stage) stepintoButton.getScene().getWindow();
diff --git a/src/main/java/fabrik/simulator/pic16f84/WatchdogTimer.java b/src/main/java/fabrik/simulator/pic16f84/WatchdogTimer.java
index ffce24b..023beac 100644
--- a/src/main/java/fabrik/simulator/pic16f84/WatchdogTimer.java
+++ b/src/main/java/fabrik/simulator/pic16f84/WatchdogTimer.java
@@ -11,12 +11,14 @@ public class WatchdogTimer {
 
     public static void testAndTrigger() {
         watchdogTime = getTimeFromRegister() * 1000;
-        if (enabled && (Commands.getTotalExecutionTime() >= (watchdogTime + lastReset - 1))){
-            DataRegister.resetPC();
-            System.err.println("Watchdog Timer triggered");
-            DataRegister.clearBit(3, 4);
-            lastReset = Commands.getTotalExecutionTime();
-            Controller_Frontend.stopRunFromBackend();
+        if (enabled) {
+            System.err.println("Remaining: " + ((watchdogTime + lastReset - 1) - Commands.getTotalExecutionTime()));
+            if (Commands.getTotalExecutionTime() >= (watchdogTime + lastReset - 1)) {
+                System.err.println("Watchdog Timer triggered");
+                DataRegister.clearBit(3, 4);
+                lastReset = Commands.getTotalExecutionTime();
+                Controller_Frontend.stopRunFromBackend();
+            }
         }
     }