CSN EN IEC 63563-6

CSN EN IEC 63563-6 The Qi Specification, Communications Protocol (this document) defines the messaging between a Power Transmitter and a Power Receiver. The primary purpose of this messaging is to set up and control the power transfer. As a secondary purpose, it provides a transport mechanism for higherlevel applications such as Authentication. The communications protocol comprises both the required order and timing relations of successive messages.
Original English text of CSN EN Standard.
The price of the Standard included all amendments and correcturs.