Vector signaling codes for densely-routed wire groups
First Claim
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1. A method comprising:
- receiving signal elements corresponding to a first group of symbols of a vector signaling codeword over a first densely-routed wire group of a multi-wire bus at a first set of multi-input comparators (MICs) for detecting a first set of subchannel vectors of a plurality of mutually orthogonal subchannel vectors, the first set of subchannel vectors being carried exclusively via the first densely-route wire group, and responsively generating a respective detected subchannel output for each subchannel vector in the first set of subchannel vectors;
receiving signal elements corresponding to a second group of symbols of the vector signaling codeword over a second densely-routed wire group of the multi-wire bus at a second set of MICs for detecting a second set of subchannel vectors of the plurality of mutually orthogonal subchannel vectors, the second set of subchannel vectors being carried exclusively via the second densely-routed wire group, and responsively generating a respective detected subchannel output for each subchannel vector in the second set of subchannel vectors; and
processing, at a global MIC, (i) signal elements received via the first densely-routed wire group according to a first sampling clock and (ii) signal elements received via the second densely-routed wire group according to a second sampling clock, the second sampling clock having an offset with respect to the first sampling clock, the offset associated with a skew difference between the first and second densely-routed wire groups, the signal elements processed at the global MIC for detecting a subchannel vector of the plurality of mutually orthogonal subchannel vectors being carried by the first and second densely-routed wire groups.
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Abstract
Methods and systems are described for receiving signal elements corresponding to a first group of symbols of a vector signaling codeword over a first densely-routed wire group of a multi-wire bus at a first set of multi-input comparators (MICs), receiving signal elements corresponding to a second group of symbols of the vector signaling codeword over a second densely-routed wire group of the multi-wire bus at a second set of MICs, and receiving signal elements corresponding to the first and the second groups of symbols of the vector signaling codeword at a global MIC.
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20 Claims
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1. A method comprising:
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receiving signal elements corresponding to a first group of symbols of a vector signaling codeword over a first densely-routed wire group of a multi-wire bus at a first set of multi-input comparators (MICs) for detecting a first set of subchannel vectors of a plurality of mutually orthogonal subchannel vectors, the first set of subchannel vectors being carried exclusively via the first densely-route wire group, and responsively generating a respective detected subchannel output for each subchannel vector in the first set of subchannel vectors; receiving signal elements corresponding to a second group of symbols of the vector signaling codeword over a second densely-routed wire group of the multi-wire bus at a second set of MICs for detecting a second set of subchannel vectors of the plurality of mutually orthogonal subchannel vectors, the second set of subchannel vectors being carried exclusively via the second densely-routed wire group, and responsively generating a respective detected subchannel output for each subchannel vector in the second set of subchannel vectors; and processing, at a global MIC, (i) signal elements received via the first densely-routed wire group according to a first sampling clock and (ii) signal elements received via the second densely-routed wire group according to a second sampling clock, the second sampling clock having an offset with respect to the first sampling clock, the offset associated with a skew difference between the first and second densely-routed wire groups, the signal elements processed at the global MIC for detecting a subchannel vector of the plurality of mutually orthogonal subchannel vectors being carried by the first and second densely-routed wire groups. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus comprising:
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a first set of multi-input comparators (MICs) connected to a first densely-routed wire group of a multi-wire bus, the first set of MICs configured to receive signal elements corresponding to a first group of symbols of a vector signaling codeword and to responsively generate a respective detected subchannel output for each subchannel vector in a first set of subchannel vectors of a plurality of mutually orthogonal subchannel vectors, the first set of subchannel vectors being carried exclusively via the first densely-route wire group; a second set of MICs connected to a second densely-routed wire group of the multi-wire bus, the second set of MICs configured to receive signal elements corresponding to a second group of symbols of the vector signaling codeword and to responsively generate a respective detected subchannel output for each subchannel vector in a second set of subchannel vectors of the plurality of mutually orthogonal subchannel vectors, the second set of subchannel vectors being carried exclusively via the second densely-route wire group; and a global MIC connected to the first and second densely-routed wire groups configured to detect a subchannel vector of the plurality of mutually orthogonal subchannel vectors being carried by the first and second densely-routed wire groups by processing (i) signal elements received via the first densely-routed wire group according to a first sampling clock and (ii) signal elements received via the second densely-routed wire group according to a second sampling clock, the second sampling clock having an offset with respect to the first sampling clock, the offset associated with a skew difference between the first and second densely-routed wire groups. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification