Efficient electrical hibernate entry and recovery
First Claim
Patent Images
1. A device for communication with a second device via differential signal lines, the device comprising:
- a controller;
one or more first switches in communication with the controller and configured to connect, during at least a part of a power-save mode in response to receiving at least one signal indicative of the power-save mode from the controller, low-impedance to a first differential signal line and to maintain voltage on the first differential signal line to the second device to be less than complementary voltages used during signaling with the second device; and
one or more second switches in communication with the controller and configured to connect, during the at least a part of a power-save mode in response to receiving the at least one signal from the controller, low impedance to a second differential signal line and to maintain voltage on the second differential signal line to the second device to be less than complementary voltages used during signaling with the second device.
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Abstract
Systems and methods for operating of one or more devices before, during, and/or after a power-save mode are provided. The system may include a transmitter device that configures the differential signal lines to low-impedance and a predetermined low-voltage during the power-save mode (such as connecting the differential signal lines to ground). The system may also include a receiver device that senses a wake-up signal, determines the type of wake-up signal, and wakes-up according to the type of wake-up signal.
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Citations
32 Claims
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1. A device for communication with a second device via differential signal lines, the device comprising:
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a controller; one or more first switches in communication with the controller and configured to connect, during at least a part of a power-save mode in response to receiving at least one signal indicative of the power-save mode from the controller, low-impedance to a first differential signal line and to maintain voltage on the first differential signal line to the second device to be less than complementary voltages used during signaling with the second device; and one or more second switches in communication with the controller and configured to connect, during the at least a part of a power-save mode in response to receiving the at least one signal from the controller, low impedance to a second differential signal line and to maintain voltage on the second differential signal line to the second device to be less than complementary voltages used during signaling with the second device. - View Dependent Claims (2, 3, 4, 5)
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6. A device configured to communicate via differential signal lines, the device comprising:
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driver circuitry configured to drive complementary voltages on the differential signal lines to encode information on the differential signal lines; circuitry in electrical communication with at least one of the differential signal lines, the circuitry configured to; receive an instruction to configure the at least one of the differential signal lines to a power-save mode; and in response to receiving the instruction, configuring the device so that the at least one of the differential signal lines is not driven from any driver circuitry during at least a part of the power-save mode. - View Dependent Claims (7, 8, 9, 10)
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11. A method of configuring differential signal lines during at least a part of a power-save mode, the method comprising:
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driving complementary voltages on the differential signal lines to encode a power-save command during a signaling mode; connecting a first differential signal line to low-impedance and a first predetermined voltage during the at least a part of a power-save mode; and connecting a second differential signal line to low-impedance and a second predetermined voltage during the at least a part of the power-save mode, wherein the first predetermined voltage and the second predetermined voltage are less than the complementary voltages during the signaling mode. - View Dependent Claims (12, 13, 14)
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15. A device configured to communicate via differential signal lines with a second device, the device comprising:
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a controller; and circuitry in communication with the controller, the circuitry configured to; receive, during at least a part of a power-save mode, predetermined low-impedance voltages on the differential signal lines to the second device, the predetermined low-impedance voltages being less than complementary voltages during a signaling mode with the second device; determine whether a differential wake-up signal has been received; and output a wake up signal to the controller in response to determining that the differential wake-up has been received. - View Dependent Claims (19)
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16. A device configured to communicate via differential signal lines with a second device, the device comprising:
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a controller; and circuitry in communication with the controller, the circuitry configured to; in a power-save mode, determine whether a differential wake-up signal has been received; and output a wake up signal to the controller in response to determining that the differential wake-up has been received, wherein the circuitry comprises an amplifier; wherein the differential signal lines includes a first differential line and a second differential line; wherein the differential wake-up signal comprises a first wake-up voltage on the first differential signal line and a second wake-up voltage on the second differential signal line; and wherein the amplifier is configured to output the wake up signal only when a difference between the first wake-up voltage and the second wake-up voltage is greater than a predetermined amount.
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17. A device configured to communicate via differential signal lines with a second device, the device comprising:
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a controller; and circuitry in communication with the controller, the circuitry configured to; in a power-save mode, determine whether a differential wake-up signal has been received; and output a wake up signal to the controller in response to determining that the differential wake-up has been received, wake-up signal evaluator circuitry configured to determine a type of the differential wake-up signal, wherein the type of the differential wake-up signal determining actions of the device to wake up in response to receiving the differential wake-up signal. - View Dependent Claims (18)
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20. A method of operating a device during a power-save mode, the method comprising:
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receiving, during a signaling mode, complementary voltages on the differential signal lines to encode a power-save command on the differential signal lines; receiving, during at least a part of a power-save mode, low-impedance and predetermined voltages on the differential signal lines, the predetermined voltages being less than the complementary voltages during the signaling mode; determining whether a differential wake-up signal has been received; and outputting a wake up signal in response to determining that the differential wake-up has been received. - View Dependent Claims (21, 22, 23, 24)
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25. A device for communication with a second device via differential signal lines, the device comprising:
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a controller; a driver circuit configured to drive complementary voltages on the differential signal lines, the driver circuit including a first amplifier and a second amplifier; a first signaling switch configured to electrically connect the first amplifier with a first differential signal line; and a second signaling switch configured to electrically connect the second amplifier with a second differential signal line, wherein the controller is configured to; operate the first signaling switch to disconnect the first amplifier from the first differential signal line during at least a part of the power-save mode; and operate the second signaling switch to disconnect the second amplifier from the second differential signal line during at least a part of the power-save mode. - View Dependent Claims (26, 27)
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28. A device for communication with a second device via differential signal lines, the device comprising:
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a controller configured to send an instruction to configure at least one of the differential signal lines to a power-save mode; and one or more switches configured to receive the instruction to configure the at least one of the differential signal lines to the power-save mode so that the at least one of the differential signal lines is substantially at ground during at least a part of the power-save mode. - View Dependent Claims (29, 30, 31, 32)
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Specification