diff --git a/doc/MANUAL.md b/doc/MANUAL.md
index e8e9c35..bd6f827 100644
--- a/doc/MANUAL.md
+++ b/doc/MANUAL.md
@@ -88,7 +88,7 @@ enter shutdown mode. There are several ways to wake up the board:
 
     1) Press BTN0
     2) Re-plug US1 micro-USB cable
-    3) RTC ALARM (using PCF8523 arduino example)
+    3) RTC ALARM (using MCP7940N or PCF8523 arduino example)
     4) Turn on Green LED D18 (using ftx_prog or libftdi)
 
 Just a short pulse at RTC (ALARM INT1 shorly pull down) or