SPECIALIZED UNIVERSAL SERIAL BUS CONTROLLER

• US 20120166700A1
• Filed: 12/20/2011
• Published: 06/28/2012
• Est. Priority Date: 04/18/2007
• Status: Active Grant

• Current Assignee: Cypress Semiconductor Corporation (Infineon Technologies AG)
• Original Assignee: Cypress Semiconductor Corporation (Infineon Technologies AG)
• Inventors: Wright, David, Kolokowsky, Steve
• Granted Patent: US 8,661,168 B2
• Time in Patent Office: Days
• US Class Current: 710/308
• CPC Class Codes: H03K 17/687 the devices being field-effect transistors
• CPC Class Codes: H03K 19/0016 by using a control or a clock signal, e.g. in order to apply power supply
• CPC Class Codes: H03K 19/00369 Modifications for compensating variations of temperature, supply voltage or other physical parameters

Abstract

An apparatus comprises a memory device to store a pre-generated Universal Serial Bus (USB) command before a USB peripheral device is coupled to a USB. The apparatus also includes a processing device to retrieve the pre-generated USB command from the memory device and transmit the pre-generated USB command to the USB peripheral device over the USB. A method comprises identifying a Universal Serial Bus (USB) peripheral device is coupled to a USB. The USB peripheral device is coupled to the universal serial bus after a pre-generated USB command is stored in a memory device. The method further includes transmitting the pre-generated USB command to the USB peripheral device over the USB in response to identifying the USB peripheral device is coupled to the USB.

Claims

1-20. -20. (canceled)

21. A method comprising:

identifying a Universal Serial Bus (USB) peripheral device is coupled to a USB, wherein the USB peripheral device is coupled to the universal serial bus after a pre-generated USB command is stored in a memory device; and

transmitting the pre-generated USB command to the USB peripheral device over the USB in response to identifying the USB peripheral device is coupled to the USB.

22. The method of claim 21 further comprising detecting a functional characteristic of the USB peripheral device, wherein transmitting the pre-generated USB command to the USB peripheral device over the USB is based, at least in part, on the detection of the functional characteristic of the USB peripheral device.

23. The method of claim 22, wherein the pre-generated USB command corresponds to the functional characteristic of the USB peripheral device.

24. The method of claim 21, wherein the pre-generated USB command compromises a packet identifier, request data, and a cyclic redundancy check value.

25. The method of claim 21, further comprising transmitting an acknowledgment message to the USB peripheral device over the USB prior to parsing a response to the USB command received from the USB peripheral device.

26. The method of claim 21, further comprising accessing of the memory device to retrieve the pre-generated USB command for transmission to the USB peripheral device over the USB.

27. The method of claim 26, wherein accessing the memory device further comprises performing one or more direct memory access operations to retrieve the pre-generated USB command.

28. The method of claim 21, wherein the pre-generated USB command is configured to instruct the USB peripheral device to enable battery charging.

29. The method of claim 28, further comprising providing power to the USB peripheral device capable of charging a battery associated with the USB peripheral device.

30. An apparatus comprising:

a memory device to store a pre-generated Universal Serial Bus (USB) command before a USB peripheral device is coupled to a USB; and

a processing device to retrieve the pre-generated USB command from the memory device and transmit the pre-generated USB command to the USB peripheral device over the USB.

31. The device of claim 30, wherein the processing device is configured to detect a functional characteristic of the USB peripheral device and transmit the pre-generated USB command to the USB peripheral device over the USB based, at least in part, on the detection of the functional characteristic of the USB peripheral device.

32. The apparatus of claim 31, wherein the pre-generated USB command corresponds to the functional characteristic of the USB peripheral device.

33. The apparatus of claim 30, wherein the pre-generated USB command compromises a packet identifier, request data, and a cyclic redundancy check value.

34. The apparatus of claim 30, wherein the pre-generated USB command is configured to instruct the USB peripheral device to enable battery charging.

35. The apparatus of claim 34, wherein the processing device is configured to provide power to the USB peripheral device capable of charging a battery associated with the USB peripheral device.

36. An apparatus comprising:

means for storing a pre-generated Universal Serial Bus (USB) command before a USB peripheral device is coupled to a USB; and

means for transferring the pre-generated USB command from the memory device to the USB peripheral device over the USB.

37. The apparatus of claim 36, further comprising means for detecting a functional characteristic of the USB peripheral device, wherein the means for transferring is configured to transmit the pre-generated USB command to the USB peripheral device over the USB based, at least in part, on the detection of the functional characteristic of the USB peripheral device.

38. The apparatus of claim 37, wherein the pre-generated USB command corresponds to the functional characteristic of the USB peripheral device.

39. The apparatus of claim 36, wherein the pre-generated USB command compromises a packet identifier, request data, and a cyclic redundancy check value.

40. The apparatus of claim 36 further comprising means for providing power to the USB peripheral device capable of charging a battery associated with the USB peripheral device, wherein the pre-generated USB command is configured to instruct the USB peripheral device to enable battery charging.