diff --git a/tech/ATMega328P.wiki b/tech/ATMega328P.wiki
index 7c18f86..b2c7568 100644
--- a/tech/ATMega328P.wiki
+++ b/tech/ATMega328P.wiki
@@ -332,3 +332,6 @@ The atmega328p can be setup on it own very easily. Connect
 
 * Pin 7 to VCC
 * Pin 8 to GND
+* Pin 21 is AREF (For ADC)
+* Pin 20 is AVcc (For ADC)
+* Pin 22 to GND