diff --git a/src/avr-asm.gmo b/src/avr-asm.gmo
index 6489aa8..04bc6fa 100644
--- a/src/avr-asm.gmo
+++ b/src/avr-asm.gmo
@@ -12,6 +12,8 @@ sudo apt install gcc-avr avrdude avr-libc
 
 # attiny85
 
+=> https://ww1.microchip.com/downloads/en/devicedoc/atmel-2586-avr-8-bit-microcontroller-attiny25-attiny45-attiny85_datasheet.pdf datasheet
+
 ## diagrama de pines
 
 ```diagrama de pines