A transmitter, a receiver, a data transfer system and a method of data transfer

A data transfer system, comprises a transmitter 12, receiving 14, data bus 20, request bus 22 and acknowledge bus 26. Transmitter 12 may comprise a state machine 18 and receiver 14 may comprise decode state circuitry 32. A communication protocol between the transmitter and receiver is defined using...

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Bibliographic Details
Main Author David Walter Flynn
Format Patent
LanguageEnglish
Published 21.12.2016
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC DIGITAL DATA PROCESSING
ELECTRICITY
PHYSICS
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:A data transfer system, comprises a transmitter 12, receiving 14, data bus 20, request bus 22 and acknowledge bus 26. Transmitter 12 may comprise a state machine 18 and receiver 14 may comprise decode state circuitry 32. A communication protocol between the transmitter and receiver is defined using a set of valid transmission states for communication from the transmitter to the receiver and a set of valid acknowledgement states for transmission from the receiver to the transmitter. A Hamming distance between patterns of zeroes, and between patterns of ones, in valid states of each of these sets is at least one, e.g. one-hot state encoding may be used. The transmitter is arranged to transition between a number of transmission states in response to the reception of an acknowledgement state from the receiver which matches a transmission state it has sent to the receiver on the request bus. A communication protocol which is robust across a multi-voltage and/or clock domain interface is thus provided. Transmitter 12 and receiver 14 may comprise respective synchronisation circuitry 25, 34.
Bibliography:Application Number: GB20150010545