| 摘要 |
A robust state machine is provided for controlling a slave interface to an I<2>C-bus. The state machine is configured to enforce the slave-device-protocol of the I<2>C specification, and to provide recovery from anomalous master-device behavior. In accordance with this invention, the state transitions of the state machine at the slave-device are controlled by the master-device's control of the SCL line of the I<2>C-bus, except if a START condition is detected. The state machine is configured to asynchronously respond to a START condition on the I<2>C-bus, regardless of its current state, to force the state machine to a known state. In the known state following the START condition, the slave-device terminates any transmissions to the I<2>C-bus, thereby minimizing subsequent interference on the bus.
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