[PDF] MFi Accessory Interface Specification for Apple Devices





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AS-Interface manual

26.09.2012 ifm AS-Interface manual – tips and tricks for users – edition 2.1 ... The AC1250 data decoupling module (accessory) must be connected!

24.4 mm6.60 mm

6.65 mm6.00 mm

Side A

Side B

Side A

Side B

1 2 3 4 5 7 6 8

9Side A

Side B

Exposed plug surfacesSoldering areaDo not mount

Insertion/extraction forceInsertion/extraction force

Plug exposureAngular biasAngular bias

Plug surfacesAccessory surfaceHidden

Exposed

A CB D A B C

Solder

100 N
10 mm 5 N 2° 15 mm

100 mm

123

15°

< 10 N

Flexible

mechanism

40 mm total minimum

Centerline

of plugAccessory

Accessory

Max 4

15°

200 mm< 5 N

123

Flexible

mechanism

50 mm< 20 N

123

15°

Flexible

mechanism D eviceAccessoryCoprocessor

RequestAuthenticationCerticate

ReadCerticateDataLength

Ce rticateDataLength

ReadCerticateData

Ce rticateData X.50

9Certicate

AuthenticationCerticate

X.50

9Certicate

RequestAuthenticationChallengeResponse

WriteChallengeLength

WriteChallengeData

WriteAuthenticationControl:

PROC_CONTROL=1

ReadStatus

Status:

PROC_RESULTS

ReadChallengeResponseLength

Challeng

eResponseLength

ReadChallengeResponseData

Challeng

eResponseData

AuthenticationResponse

AuthenticationSucceeded

Cont D eviceAccessory

RequestAuthenticationCerticate

AuthenticationCerticate

AuthenticationFailed

Cont D eviceAccessory

RequestAuthenticationCerticate

AuthenticationCerticate

RequestAuthenticationChallengeResponse

AuthenticationResponse

AuthenticationFailed

Cont D eviceAccessory

StartIdentication

IdenticationIn

formation

Identication

Accepted

Cont D eviceAccessory

StartIdentication

IdenticationIn

formation

Identication

Rejected

IdenticationIn

formation

Identication

Accepted

Cont D eviceAccessory

StartIdentication

IdenticationIn

formation

Identication

Rejected

IdenticationIn

formation

Identication

Rejected

CancelIdentication

Cont D eviceAccessory

StartIdentication

IdenticationIn

formation

Identication

Accepted

IdenticationIn

formationUpdate Cont D eviceAccessory

IdenticationIn

formation

USBTransportComponent:

0 DockConnector

TransportSupportsiAP2Connection

32kH
z(6)

44.1kH

z(7) 48kH
z(8) iAP2HIDComponent: 0 FrontPanel MediaPlaybackRemote(1)

Identication

Accepted

StartHID:

StartUSBDeviceModeAudio

(Use rpushesbuttonlabeled"Play/Pause")

AccessoryHIDReport:

0 USBD eviceModeAudioInformation: 32kHz(6) 0dB 0dB Cont D eviceAccessory

SYN[100]

Sessio

nType:2(ExternalAccessorySession)

SYN[200]ACK[100]

ACK[200]

IdenticationIn

formation

MessagesReceivedFromDevice:

0xEA00 0xEA01

SupportedExternalAccessoryProtocols:

0 com.company.accessory 1

Identication

Accepted

StartExternalAccessoryProtocolSession

0 >0 Cont rolSessionControlSessioniAP2EASession

LinkLinkExternalAccessorySession

StopExternalAccessoryProtocolSession

>0 Cont rolSessionControlSessioniAP2EASession D eviceAccessory Enume ration US

BInterfaceDescriptor:

Interfac

Alternat

eSetting0 Numbe rofEndpoints0

Interfac

eClass:255(Vendor-specic)

Interfac

eSubclass;240(Vendor-specic)

Interfac

eProtocol:1

Interfac

Alternat

eSetting1 Numbe rofEndpoints2

Interfac

eClass:255(Vendor-specic)

Interfac

eSubclass;240(Vendor-specic)

Interfac

eProtocol:1

Endpoin

t0x04-BulkOutput

Endpoin

t0x83-BulkInput

USBUSB

IdenticationIn

formation

SupportedExternalAccessoryProtocols:

0 com.accessory.protocolname 1 0

USBHostTransportComponent:

0 DockConnector

TransportSupportsiAP2Connection

Identication

Accepted

Cont Selec tInterface#1,AlternateSetting#1

USBUSBAppOpensEASession

Selec tInterface#1,AlternateSetting#0

USBUSBAppClosesEASession

4-pin

3.5mm plug33 pF10 pF

SWL01 L02

VAR1FET impedance

converter shield caseMicrophone

Apple deviceAccessory

Left channel

Headphones

R1 C1

Output

Ground

42
31

Right channel

2.7 V R2

Plug Diameter

3.50 +0.03/ -0.05 mm

All flanges on connector

must be non-conductive

Plug length

14.00

± 0.10 mm

Pin 1

Pin 2Pin 3Pin 4

Bottom Viewe

1 H D H 1 zC

CSeating plane

A BW e

Ball A1

index area C B Ag g 1 12 yM 6Xs CAB

TONE2.3VSwitch A

MICPWR

REM

GNDMIC

VSHUNT

1.56V

Switch B

Latch Tone

GeneratorImpedance

Detector

Power-on

Reset V

MIC2.5V

2.35V 0V t OFFBquotesdbs_dbs14.pdfusesText_20
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