-// Plus 2 types of control words: //
-// - Jitter word = 1000 //
-// - End of module data (needed by the Cluster Finder) = 1111 //
+// Plus 3 types of control words //
+// identified by the the 4 most significant bits (31-28) //
+// 1) Jitter word = 1000 //
+// 2) JTAG answer = 1100 //
+// 3) End of module data (needed by the Cluster Finder) = 1111 //