Circuit and method for credit-based flow control
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United States of America Patent
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Jun 9, 2020
Grant Date -
Jan 11, 2018
app pub date -
Jul 6, 2017
filing date -
Jul 6, 2016
priority date (Note) -
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Abstract
A receiving circuit of a communications link comprises: a first data buffer configured to input, under control of a first clock signal, data of a first data stream transmitted by a transmitting circuit, and to generate a credit trigger signal indicating when a data value is read from the first data buffer, wherein data is read from the first data buffer, or from a further data buffer coupled to the output of the first data buffer, under control of a second clock signal; and a credit generation circuit configured to generate, based on the credit trigger signal, a credit signal for transmission to the transmitting circuit under control of the first clock signal, the credit signal indicating that one or more further data values of the first data stream can be transmitted by the transmitting circuit.
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