Adapter for electronic devices

• US 8,478,913 B2
• Filed: 11/16/2012
• Issued: 07/02/2013
• Est. Priority Date: 11/30/2011
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Apple Inc.
• Inventors: Terlizzi, Jeffrey J., Fritchman, Daniel J., Krueger, Scott, Tikalsky, Terry, Sillman, Debra A., Ng, Tony Chi Wang
• Primary Examiner(s): Spittle, Matthew D
• Application Number:
  US13/680,000
• Publication Number:
  US 20130138861A1
• Time in Patent Office: 228 Days
• Field of Search: 710/62, 710/316, 710/303, 710/72, 710/10, 340/5.8, 455 411- 413, 713/300
• US Class Current: 710/62
• CPC Class Codes: G06F 21/44 Program or device authentication
• CPC Class Codes: G06F 21/85 interconnection devices, e.g. bus-connected or in-line devices

Abstract

An adapter for connecting an accessory to a portable electronic device includes a first connector compatible with a connector of the portable electronic device and a second connector compatible with a connector of the accessory. The connectors of the accessory and the portable electronic device are otherwise incompatible with each other. The adapter provides two levels of authentication. First, the adapter authenticates itself to the portable electronic device. If this first authentication is successful, then the adapter authenticates the accessory to the adapter.

Claims

1. An adapter for providing a communication path between a portable electronic device and an accessory, the adapter comprising:

a first connector to mate with a plug connector on a first device;

a second connector that is incompatible with the first connector, the second connector being configured to mate with a receptacle connector on a second device in either of two orientations rotated 180 degrees from each other, the second connector including a first set of eight external contacts spaced apart along a first row on a first side of the second connector and a second set of eight external contacts spaced apart along a second row on a second side of the second connector opposite the first side, the first set of contacts including first and second data contacts coupled to first and second data contacts, respectively, in the second set of contacts; and

conversion circuitry configured to convert signals received from the first device to a format that can be transmitted to and processed by the second device and to convert signals received from the second device to a format that can be transmitted to and processed by the first device;

identification circuitry configured to indicate a communication protocol used by the first and second data contacts to the second device; and

authentication circuitry configured to implement a first level of authentication that authenticates the adapter to the second device and, if the first level of authentication is successful, implement a second level of authentication that authenticates the first device to the adapter.

2. The adapter of claim 1 wherein the first connector includes thirty contacts.

3. The adapter of claim 2 wherein the thirty contacts of the first connector include an ID contact configured to receive an accessory ID signal, a pair of contacts configured to carry a universal serial bus (USB) signal, a power contact, a plurality of ground contacts, an accessory detect contact configured to carry an accessory detect signal, and a pair of analog audio contacts configured to carry left and right audio signals.

4. The adapter of claim 1 wherein the each contact in the first set of eight contacts in the second connector is coupled to a contact in the second set of eight contacts in the second connector.

5. The adapter of claim 4 wherein the first set of eight contacts further includes an ID contact configured to carry identification signal, third and fourth data contacts, and a power contact configured to carry a host power signal from the first device to the second device.

6. The adapter of claim 5 further comprising a current regulator operatively coupled to the power contact in the first set of eight contacts to regulate current to the second device when the first connector is connected to a device that enables charging.

7. The adapter of claim 4 wherein the first and second data contacts function as a first pair of high speed data contacts and the third and fourth data contacts function as a second pair of high speed data contacts and a rate of data carried by each of the first and second pairs of data contacts is two or more orders to magnitude higher than a rate at which information is transmitted over the ID contact in the first set of eight contacts.

8. The adapter of claim 2 further comprising circuitry that sets at least some contacts in the thirty contacts of the first connector to an open state until after the adapter authenticates itself to the second device.

9. The adapter of claim 1 wherein the authentication circuitry comprises:

an identification device configured to provide identification information of the adapter to the portable electronic device; and

a power control device configured to control a power path between the accessory and the portable electronic device.

10. The adapter of claim 9 wherein each of the identification device and the power control device are implement as a single integrated circuit (IC) chip.

11. An adapter for providing a communication path between a portable electronic device and an accessory, the adapter comprising:

a first connector to mate with a plug connector on a first device, the first receptacle connector having thirty contacts including a first pair of USB differential data contacts, a first power contact and left and right audio contacts;

a second connector that is incompatible with the first connector, the second connector being configured to mate with a receptacle connector on a second device in either of two orientations rotated 180 degrees from each other, the second connector including a first set of eight external contacts spaced apart along a first row on a first side of the second connector and a second set of eight external contacts spaced apart along a second row on a second side of the second connector opposite the first side, wherein each contact in the first set of contacts is coupled to a contact in the second set of contacts and the first set of contacts includes a second pair of USB differential data contacts and a second power contact;

identification circuitry configured to indicate to the second device a communication protocol used by at least some contacts in the second connector;

authentication circuitry configured to implement a first level of authentication that authenticates the adapter to the second device and, if the first level of authentication is successful, implement a second level of authentication that authenticates the first device to the adapter; and

conversion circuitry configured to, if the first and second levels of authentication are successfully implemented;

(i) convert audio signals received from the first device over the left and right audio contacts to a format that can be transmitted to and processed by the second device, convert audio signals received from the second device to a format that can be transmitted over the left and right audio contacts to and processed by the first device, (ii) exchange data between the first and second devices over the first and second pairs of USB differential data contacts, and (iii) enable a power path between the first and second devices.

12. The adapter of claim 11 further comprising switching circuitry that sets at least some contacts in the thirty contacts of the first connector to an open state prior to the adapter authenticating itself to the second device.

13. The adapter of claim 12 wherein after the adapter is authenticated to the second device, the switching circuitry connects at least some of the at least some contacts in the thirty contacts of the first connector to other circuitry within the adapter.

14. The adapter of claim 13 wherein the thirty contacts of the first connector further includes a pair of receive and transmit contacts and an accessory detect contact each of which is set to an open state by the switching circuitry prior to the adapter authenticating itself to the second device and each of which is then subsequently connected to other circuitry upon the adapter and second device being operatively coupled to each other.

15. The adapter of claim 11 further comprising a housing having a first side and a second side, opposite the first side;

and wherein the first connector is disposed at the first side of the housing and the second connector is disposed at the second side of the housing.

16. A method of using an adapter to enable an accessory electronic device having a first connector to exchange data with a host electronic device having a second connector that is incompatible with the first connector, the method comprising:

sending identification and authentication information from the adapter to the host device to enable the host to perform a first level of authentication that authenticates the adapter to host device upon mating a plug connector on the adapter to the second connector of the host device;

if the adapter is successfully authenticated by the host device, receiving identification and authentication information from the accessory and performing a second level of authentication at the adapter to authenticate an accessory electronic device connected to the adapter; and

after the first and second levels of authentication are successfully completed, enabling a power path between the accessory device and the host device.

17. The method of claim 16 wherein:

the receptacle connector on the adapter includes thirty pins;

the plug connector on the adapter is configured to mate with the receptacle connector on the accessory device in either of two orientations rotated 180 degrees from each other; and

the plug connector on the adapter includes a first set of eight external contacts spaced apart along a first row on a first side of the second connector and a second set of eight external contacts spaced apart along a second row on a second side of the second connector opposite the first side, the first set of contacts including first and second data contacts coupled to first and second data contacts, respectively, in the second set of contacts.

18. The method of claim 16 wherein after the first and second levels of authentication are successfully completed, the adapter enables data to be exchanged between the accessory device and the host device over the first and second data contacts.

19. The method of claim 18 wherein enabling the power path further comprises sending a signal to a power control device disposed within the adapter based on receiving the identification information from the accessory device.

20. The method of claim 16 further setting an accessory detect contact in the thirty contacts of the first connector to an open state prior to the adapter authenticating itself to the second device and, after the adapter is authenticated to the second device, connecting the accessory detect contact to other circuitry within the adapter.