Hi Guys,
Thank you for the prompt response.
In fact I'd like decode the HT6P20 (learning code), but I know this chip is not so easy to unveil. As I'm still learning, I don't have advanced knowledge to create this decode.
The idea is to press learning button on Arduino that can store the code sent by the chip (HT6P20) . After that, this remote control registered on Arduino is able to execute some actions.
I have this decode in ASM (ASM51 • Exibir tópico - HT6P20 "CHEGA PELO AMOR DE DEUS".), but I can not translate to Arduino.
Datasheet:
http://www.datasheetcatalog.org/datasheets/120/170613_DS.pdf
Thanks in advance (again) 
BR,
Manoel