21.2 External Power Source 76
21.3 Declaring Capability 77
21.4 Providing Power via USB Connectors 77
21.5 Labeling Multiple Connectors 78
21.6 Fast Charge for iPhone (18 W) 78
21.7 Overcurrent and Short Circuit Protection 79
21.8 Overcurrent and Short Circuit Protection Resets 80
21.9 Power State Changes 80
22. Location Information 81
23. MagSafe Attach 82
23.1 MagSafe Case Magnet Array 83
23.1.1 Product Design 83
23.1.2 Mechanical 83
23.1.3 Magnetic Interference 89
23.2 MagSafe Accessory Magnet Array 89
23.2.1 Product Design 90
23.2.2 Mechanical 90
23.3 Test Procedures 95
23.3.1 MagSafe Case Magnet Array 95
24. Media Library Access 97
25. Now Playing Updates 98
26. Out-of-Band Bluetooth Pairing 99
27. Siri 100
27.1 Enabling Custom Siri Commands 100
27.2 Obtaining Siri Availability Information 100
27.2.1 Obtaining Status Information at Connection 100
27.2.2 Receiving Siri Availability Updates from the Device 101
27.3 Initiating a Siri Session 102
27.3.1 Initiating a Session from the Accessory 102
27.3.2 Initiating a Session from the Device 103
27.3.3 Ending a Session from the Accessory 104
27.4 Siri Eyes Free Mode 104
27.4.1 HFP Command AT+APLEFM 105
27.5 Improving Voice Recognition 105
2020-10-16 | Copyright © 2020 Apple Inc. All Rights Reserved.
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