High data rate interface

• US 8,719,334 B2
• Filed: 09/10/2004
• Issued: 05/06/2014
• Est. Priority Date: 09/10/2003
• Status: Expired due to Fees

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Anderson, Jon James, Steele, Brian, Wiley, George Alan, Shekhar, Shashank
• Primary Examiner(s): Cheema, Umar
• Application Number:
  US10/938,354
• Publication Number:
  US 20050120079A1
• Time in Patent Office: 3,525 Days
• Field of Search: 709/203, 709/230, 710/35, 370/241, 370/335
• US Class Current: 709/203
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/70 Media network packetisation
• CPC Class Codes: H04L 69/14 Multichannel or multilink protocols
• CPC Class Codes: H04L 69/18 Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04L 69/24 Negotiation of communication capabilities
• CPC Class Codes: H04M 1/72409 by interfacing with external accessories hands-free H04M1/60
• CPC Class Codes: H04M 1/72412 using two-way short-range wireless interfaces
• CPC Class Codes: Y02D 30/50 in wire-line communication networks, e.g. low power modes or reduced link rate
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A data Interface for transferring digital data between a host and a client over a communication path using packet structures linked together to form a communication protocol for communicating a pre-selected set of digital control and presentation data. The signal protocol is used by link controllers configured to generate, transmit, and receive packets forming the communications protocol, and to form digital data into one or more types of data packets, with at least one residing in the host device and being coupled to the client through the communications path. The interface provides a cost-effective, low power, bi-directional, high-speed data transfer mechanism over a short-range “serial” type data link, which lends itself to implementation with miniature connectors and thin flexible cables which are especially useful in connecting display elements such as wearable micro-displays to portable computers and wireless communication devices.

Claims

1. A method of redefining a first logic threshold and a second logic threshold for a hibernation state of a digital data interface communication system, the method comprising the steps of:

sending a link shut down packet from a host to a client wherein a first logic level and a second logic level determine the first logic threshold of at least one data receiver;

disabling at least one data driver and placing its output into a high impedance state by the host wherein a third logic level and a fourth logic level determine the second threshold of at least one hibernation receiver and wherein the fourth logic level is produced by the disabled at least one data driver in the high impedance state;

sending a wake up pulse to the at least one hibernation receiver, wherein the wake up pulse comprises outputting the third Logic level;

and detecting the wake up pulse by the;

at least one hibernation receiver.

2. The method of claim 1 wherein the step of disabling further comprises disabling at least one high-speed differential data packet receiver.

3. The method of claim 1 wherein the step of sending a wake up pulse comprises the host sending the wake up pulse.

4. The method of claim 1 wherein the step of sending a wake up pulse comprises the Client sending the wakeup pulse.

5. The method of claim 1 wherein the first logic level is substantially equal to the third logic level.

6. A non-transitory storage media comprising program instructions which are computer-executable to implement redefinition of a first logic threshold and a second logic threshold for a hibernation state of a digital data interface communication system and which when executed perform the steps of:

sending a link shut down packet from a host to a client wherein a first logic level and a second logic level determine the first logic threshold of at least one data receiver;

disabling at least one data driver and placing its output into a high impedance state by the host wherein a third logic level and a fourth logic level determine the second threshold of at least one hibernation receiver and wherein the fourth logic level is produced by the disabled at least one data driver in the high impedance state;

sending a wake up pulse to the at least one hibernation receiver, wherein the wake up pulse comprises the third logic level output; and

detecting the wake up pulse by the at least one hibernation receiver.

7. The non-transitory storage media of claim 6 wherein disabling at least one data driver further comprises disabling at least one high-speed differential data packet receiver.

8. The non-transitory storage media of claim 6 wherein sending the wake up pulse comprises the host sending the wake up pulse.

9. The non-transitory storage media of claim 6 wherein sending the wake up pulse comprises the client sending the wake up pulse.

10. The non-transitory storage media of claim 6 wherein the first logic level is substantially equal to the third logic level.

11. A method of redefining a first logic threshold and a second logic threshold for a hibernation state of a digital data interface communication system, the method comprising:

sending a link shut down packet, having a first logic level and a second logic level, from an output of a data driver in a host to a data receiver in a client, wherein the data receiver has the first logic threshold, and the first logic level and the second logic level correspond to the first logic threshold;

in association with sending the link shut down packet,

disabling the output of the data driver,

placing the output of the data driver in a high impedance state,

driving the output of the data driver, when disabled and in the high impedance state, to a disabled state voltage;

sending a service request, from a data driver in the client to a data receiver in the host and, in association with the sending the service request, offsetting a threshold voltage of the hibernation receiver in the client, from the first logic threshold to the second logic threshold, wherein the second logic threshold corresponds to a third logic level and a fourth logic level;

sending from the host, in response to receiving the service request, a wake up pulse to the hibernation receiver in the client, wherein the wake-up pulse corresponds to the third logic level; and

detecting, based on the second logic threshold a reception of the wake up pulse by the hibernation receiver in the client, or both.

12. The method of claim 11, further comprising changing, in response to detecting the reception of the wake-up pulse, changing the threshold voltage of the hibernation receiver in the client, from the second logic threshold to the first logic threshold.