Hi,
Ahh, OK you want to write code for the receiver. I'm sorry I misunderstood the question there.

I think you would need a matching decoder chip, however looking at the HOLTEK website there doesn't seem to exist such a thing - like there is with the HT12 series for example.

If you're trying to receive data without a corresponding decoder chip then you're going to have to look at the timing diagram at page 4 in the datasheet and then try to write code that syncs the receiver with the pilot period of the transmision and then deciphers the data according to the timings for "0", "1" and "open". I don't think SERIN will do it. Hopefully someone else has more hands on experience with these than I have and could lend you hand.

Again, sorry for missunderstanding the original question!

/Henrik.