diff --git a/avr/common/utils_wait_fixed.asm b/avr/common/utils_wait_fixed.asm
index 028774d..9be3aba 100644
--- a/avr/common/utils_wait_fixed.asm
+++ b/avr/common/utils_wait_fixed.asm
@@ -36,3 +36,21 @@ Utils_WaitFor50MicroSecs:
     ret
 ; @end
 
+
+
+; ---------------------------------------------------------------------------
+; @routine Utils_WaitFor100MicroSecs @global
+;
+; wait for about 100 microsecs.
+;
+; @clobbers r22
+
+Utils_WaitFor100MicroSecs:
+    rcall Utils_WaitFor50MicroSecs
+    rcall Utils_WaitFor50MicroSecs
+    ret
+; @end
+
+
+
+