diff --git a/scratch.txt b/scratch.txt
index 7c0950f..372ccac 100644
--- a/scratch.txt
+++ b/scratch.txt
@@ -1,3 +1,6 @@
+ATMEGA328p can achieve 400 000 bauds. U2Xx=1 and UBRx=4
+
+
 /*
 FIXME this should work, but does not...