Low power low frequency squelch break protocol
OwnerMahesh Waghinventor
Life of this patent
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Abstract
Methods and apparatus for provision of a low power, low frequency squelch break protocol are described. In some embodiments, a fixed or variable time transmitter LFPS (Low Frequency Periodic Signaling) mechanism may be used that does not require a handshake and therefore much simpler in implementation than USB3 (Universal Serial Bus 3.0), for example. Also, an embodiment does not require a link common mode to be established and therefore may be optimized to support shorter durations for effecting exit from an electrical idle state that may be established via power-gating, for example. Other embodiments are also disclosed.
Claims30
An apparatus comprising:
- a first agent coupled to a second agent via a link;
- and
- the first agent having controller logic to cause the link to exit from an electrical idle state in response to a Low Frequency Periodic Signaling (LFPS) signal,
- wherein a transmit duration time of the LFPS signal is to be greater than a time it takes a receiver logic of the second agent to detect the LFPS signal.
A method comprising:
- receiving a Low Frequency Periodic Signaling (LFPS) signal over a link that couples a first agent to a second agent;
- and
- causing the link to exit from an electrical idle state in response to the LFPS signal at a controller logic of the first agent,
- wherein a transmit duration time of the LFPS signal is to be greater than a time it takes a receiver logic of the second agent to detect the LFPS signal.
A computing system comprising:
- an input/output hub to couple a processor core and an input/output device via a link;
- and
- the input/output hub having controller logic to cause the link to exit from an electrical idle state in response to a Low Frequency Periodic Signaling (LFPS) signal,
- wherein a transmit duration time of the LFPS signal is to be greater than a time it takes a receiver logic to detect the LFPS signal.
Dependencies are inferred from the claim text.