I think the white pins are for downloading some sort of program to the chip.
I don't think there is a data sheet. You could try looking at these links though.
http://www.usfirst.org/uploadedFiles...%20_121007.pdf
This link is info on the original TinyIR2 that our board is based after.
http://www.tauntek.com/tinyir2-learn...l-receiver.htm