AT89S51 for Gate Lock with keypad and IR Remote

I just start it for my final exams.
The idea is the dor open when correct key sequence pressed with keypad or with IR Remote.

For keypad interfacing I have no problem.
I need help to interface IR receiver with AT89S51.
If anyone have idea how to do this, or have any circuits please let me know.

Thank you...

u can use rc5 remote control and sensor with your 51 chip

the following link has all the data u will need.

**broken link removed**

keep posting

Different ATMEL device, similar application:
AVR IR Transmitter

Thank you for your information, I really appreciate it.