Bidirectional port with clock channel used for synchronization
First Claim
1. A bidirectional port circuit comprising:
- a data transceiver;
a clock driver with an enable input node; and
a control circuit to drive the enable input node when the data transceiver is initialized.
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Accused Products
Abstract
A simultaneous bidirectional port coupled to a bus combines a synchronization circuit and a clock circuit. The synchronization and clock circuit synchronizes the port with another simultaneous data port coupled to the same bus. A clock driver circuit is provided that is capable of being turned on and off. Prior to synchronization, the clock driver is off, and after synchronization, the clock driver is on. A clock receiver circuit includes a clock detection circuit to detect the presence of an input clock signal. When an integrated circuit is ready to communicate, the output clock driver is turned on and the clock detection circuit is monitored to determine when an input clock signal is received. When both the output clock driver is turned on, and an input clock signal is being received, the simultaneous bidirectional port is synchronized, and communication between integrated circuits can take place.
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Citations
30 Claims
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1. A bidirectional port circuit comprising:
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a data transceiver;
a clock driver with an enable input node; and
a control circuit to drive the enable input node when the data transceiver is initialized. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 26, 27, 28, 29, 30)
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12. An integrated circuit comprising:
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an output driver to drive a data signal on a data node external to the integrated circuit;
an initialization circuit to initialize the output driver; and
a clock driver responsive to the initialization circuit such that the clock driver drives an outbound clock signal off the integrated circuit when the output driver is initialized.
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25. An electronic system comprising:
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a first integrated circuit having a first simultaneous bidirectional port comprising a first data driver, a first data receiver, a first clock driver with a first enable input node, and a first clock receiver with a first clock detect circuit; and
a second integrated circuit having a second simultaneous bidirectional port comprising a second data driver, a second data receiver, a second clock driver with a second enable input node, and a second clock receiver with a second clock detect circuit;
wherein output nodes of the first and second data drivers are coupled in common with input nodes of the first and second data receivers, the first and second integrated circuits include initialization circuits, and the first and second enable input nodes are coupled to the initialization circuits to enable clock signals after the first and second simultaneous bidirectional ports are initialized.
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Specification