diff --git a/README.md b/README.md
index 1f24bae..0300f72 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,3 @@
 # libopencm3_stm32f3_opamp
+
+Opamp config routines and definitions for STM32F303 (and maybe other F3 processors).