Synchronous serial data-exchange system
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United States of America Patent
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Apr 7, 2015
Grant Date -
May 22, 2014
app pub date -
Feb 14, 2012
filing date -
Feb 15, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A serial interface comprises a clock line, a request line, a ready line, a master-to-slave data line, and a slave-to-master data line. A master device transmits a clock signal to a slave device over the clock line. In a first transaction, the master device sends a master transmission request signal to the slave device over the request line; in response, the slave device sends a slave transmission accept signal over the ready line, which causes the master device to transmit binary data to the slave device over the master-to-slave data line. In a second transaction, the slave device sends a slave transmission request signal over the ready line; in response, the master device sends a master transmission accept signal over the request line, which causes the slave device to transmit binary data to the master device over the slave-to-master data line. In at least one of the transactions, the master and slave devices transmit binary data at the same time as each other.
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