Methods and systems for high bandwidth chip-to-chip communications interface
First Claim
Patent Images
1. A system for interconnection of integrated circuit devices, comprising:
- an interconnection comprising one or more interconnection wire groups, each interconnection wire group configured to communicate signals representing a code word of a vector signaling code;
an encoder configured to convert a current input data word into a transmit code word of the vector signaling code by modifying a portion of elements of a previously transmitted code word based on a set of difference bits representing a change of value from a previous input data word and the current input data word; and
,a transmit driver configured to emit signals on interconnection wires of an interconnection wire group of the one or more interconnection wire groups that correspond to elements of the transmit code word.
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Abstract
Systems and methods are described for transmitting data over physical channels to provide a high bandwidth, low latency interface between integrated circuit chips with low power utilization. Communication is performed using group signaling over multiple wires using a vector signaling code, where each wire carries a low-swing signal that may take on more than two signal values.
55 Citations
20 Claims
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1. A system for interconnection of integrated circuit devices, comprising:
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an interconnection comprising one or more interconnection wire groups, each interconnection wire group configured to communicate signals representing a code word of a vector signaling code; an encoder configured to convert a current input data word into a transmit code word of the vector signaling code by modifying a portion of elements of a previously transmitted code word based on a set of difference bits representing a change of value from a previous input data word and the current input data word; and
,a transmit driver configured to emit signals on interconnection wires of an interconnection wire group of the one or more interconnection wire groups that correspond to elements of the transmit code word. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method comprising:
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encoding a current input data word as at least one transmit code word of a vector signaling code, the transmit code word comprising symbols from an alphabet of three or more distinct values, by modifying a portion of elements of a previously transmitted code word based on a set of difference bits representing a change of value from a previous input data word and the current input data word; and
,transmitting symbols of the at least one transmit code word on at least one set of wires. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification