1.1 Structure of the Qi Specification

General documents

• Introduction

• Glossary, Acronyms, and Symbols

System description documents

• Mechanical, Thermal, and User Interface

• Power Delivery

• Communications Physical Layer

• Communications Protocol

• Foreign Object Detection

• NFC Tag Protection

• Authentication Protocol

1.2 Scope

The Communications Physical Layer (this document) defines the low-level (physical layer and the data link layer) formats of data bits, data bytes, and data packets. In addition, it provides requirements and guidelines for load modulation and frequency-shift keying.

1.3 Compliance

All provisions in the Qi Specification are mandatory, unless specifically indicated as recommended, optional, note, example, or informative. Verbal expression of provisions in this Specification follow the rules provided in ISO/IEC Directives, Part 2.

1.4 References

For undated references, the most recently published document applies. The most recent WPC publications can be downloaded from http://www.wirelesspowerconsortium.com.

1.5 Conventions

1.6 Power Profiles

A Power Profile determines the level of compatibility between a Power Transmitter and a Power Receiver. Table 3 defines the available Power Profiles.

• BPP PTx: A Baseline Power Profile Power Transmitter.

• EPP5 PTx: An Extended Power Profile Power Transmitter having a restricted power transfer capability, i.e. PL(pot)=5W.

• EPP PTx: An Extended Power Profile Power Transmitter.

• BPP PRx: A Baseline Power Profile Power Receiver.

• EPP PRx: An Extended Power Profile Power Receiver.