PCI-E extended reach with receive detect circuitry
First Claim
Patent Images
1. An Apparatus comprising:
- a type one protocol device physical layer transmitter that performs a physical layer detection function to detect type one protocol device physical layer receivers attached via an interconnect, said detection function operating such that in response to a signal sent from the physical layer detection function, physical layer receivers having type one physical layer termination cause the interconnect to charge and physical layer receivers having type two physical layer termination appear as an open circuit to said physical layer detection function;
a type two protocol device physical layer receiver having type two physical layer termination, the type two protocol device physical layer receiver being connected to the type one protocol device physical layer transmitter by at least one differential signal pair; and
logic functional such that when said logic is coupled to the at least one differential signal pair between the type two protocol device physical layer receiver and the type one protocol device physical layer transmitter, the type one protocol device physical layer transmitter detection function detects the type two protocol device physical layer receiver as a type one protocol device physical layer receiver by causing the at least one differential signal to charge in order to indicate that the type two protocol device physical layer receiver is a valid type one protocol device physical layer receiver and to enable the type two protocol device physical layer receiver to functionally receive type one protocol communications directly from the type one protocol device physical layer transmitter over the at least one differential signal pair.
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Abstract
A type one protocol device transmitter performs a detection function to detect attached type one protocol receivers. The detection function operates such that receivers having type two termination are not detected as type one protocol receivers. A type two protocol device receiver has type two termination. Logic is coupled between the type two protocol device receiver and the type one protocol device transmitter so that the type one protocol device transmitter detection function detects the type two protocol device receiver as a type one protocol receiver. The type one protocol device can be a PCI-E device, and the type two protocol device can be a SAS/SATA device.
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Citations
19 Claims
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1. An Apparatus comprising:
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a type one protocol device physical layer transmitter that performs a physical layer detection function to detect type one protocol device physical layer receivers attached via an interconnect, said detection function operating such that in response to a signal sent from the physical layer detection function, physical layer receivers having type one physical layer termination cause the interconnect to charge and physical layer receivers having type two physical layer termination appear as an open circuit to said physical layer detection function; a type two protocol device physical layer receiver having type two physical layer termination, the type two protocol device physical layer receiver being connected to the type one protocol device physical layer transmitter by at least one differential signal pair; and logic functional such that when said logic is coupled to the at least one differential signal pair between the type two protocol device physical layer receiver and the type one protocol device physical layer transmitter, the type one protocol device physical layer transmitter detection function detects the type two protocol device physical layer receiver as a type one protocol device physical layer receiver by causing the at least one differential signal to charge in order to indicate that the type two protocol device physical layer receiver is a valid type one protocol device physical layer receiver and to enable the type two protocol device physical layer receiver to functionally receive type one protocol communications directly from the type one protocol device physical layer transmitter over the at least one differential signal pair. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An Apparatus comprising:
logic coupled to a differential signal pair that connects a PCI-E physical layer transmitter of a PCI-E device to a SAS/SATA physical layer receiver, the logic causing the PCI-E physical layer transmitter to recognize the SAS/SATA physical layer receiver as a valid PCI-E receiver by causing the differential signal pair to charge upon transmission of a PCI-E physical layer transmission to indicate to the PCI-E device that the SAS/SATA physical layer receiver is a valid PCI-E receiver and to enable the SAS/SATA physical layer receiver to functionally receive communications directly from the PCI-E physical layer transmitter over the differential signal pair. - View Dependent Claims (9, 10, 11, 12)
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13. A method comprising the steps of:
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providing a type one protocol device physical layer transmitter that performs a physical layer detection function to detect type one protocol device physical layer receivers attached via an interconnect, said detection function operating such that in response to a signal sent from the physical layer detection function, physical layer receivers having type one physical layer termination cause the interconnect to charge so physical layer receivers having type two physical layer termination appear as an open circuit to said physical layer detection function; providing a type two protocol device physical layer receiver having type two physical layer termination, the type two protocol device physical layer receiver being connected to the type one protocol device physical layer transmitter by at least one differential signal pair; and coupling logic to the at least one differential signal pair between the type two protocol device physical layer receiver and the type one protocol device physical layer transmitter, the logic functional to cause the type one protocol device transmitter physical layer detection function to detect the type two protocol device physical layer receiver as a type one protocol device physical layer receiver by causing the at least one differential signal pair to charge to indicate that the type two protocol device physical layer receiver is a valid type one protocol device physical layer receiver and to enable the type two protocol device physical layer receiver to functionally receive type one protocol communications directly from the type one protocol device physical layer transmitter over the at least one differential signal pair. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification