http://download.microsoft.com/download/7/d/d/7dd44bb7-2a7a-4505-ac1c-7227d3d96d5b/hid-over-i2c-protocol-spec-v1-0.docx
http:// download. microsoft. com/download/ 7/d/d/7dd44bb7- 2a7a-4505- ac1c-7227d3d96d 5b/hid- over-i2c- protocol- spec-v1- 0.docx