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AssigneeNEC Corporation
InventorTakayuki Nyu
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A signal sending-and-receiving circuit is used for a long-distance port in a node having a state machine within a serial-bus network, wherein a sending section performs scrambling, coding and conversion on signals given from the state machine to produce serial signals which are sent onto a transmission path, while a receiving section performs conversion, de-scrambling and decoding on signals given from the transmission path to produce decoded signals. A control signal is created based on a Data_prefix signal detected from the signals of the state machine, and an Idle signal or a Grant signal detected from the decoded signals. The control signal controls a selector to selectively output either the decoded signals or a pseudo Idle signal which is newly created. Then, a collision signal is created in response to an output of the selector. Thus, it is possible to avoid collision between a grant signal and a Self ID packet, so it is possible to prevent the Self ID packet from being damaged. In addition, the state machine is designed to have six states, namely, S0 (Self ID Start), S1 (Self ID Grant), S2 (Self ID Receive), S3 (Send Speed Capabilities), S4 (Self ID Transmit) and S5 (Self ID Suspend). Herein, the state machine is placed in the state S5 to suspend the Self ID process until the node detects Idle at a parent port connected to a parent node after detecting Idle at a receive port receiving the Self ID packet from another node.
A signal sending-and-receiving circuit of a serial-bus device applicable to a plurality of nodes having parent-child relationships, wherein when receiving a Self ID packet from a child node after receiving a Grant signal from a parent node, said signal sending-and-receiving circuit blocks the Grant signal from being transmitted therefrom until receiving an Idle signal from the parent node.
A signal sending-and-receiving circuit of a serial-bus device applicable to a plurality of nodes having parent-child relationships, wherein when receiving a Self ID packet from a child node after receiving a Grant signal from a parent node, said signal sending-and-receiving circuit blocks the Grant signal from being transmitted therefrom by generating a pseudo Idle signal until receiving an Idle signal from the parent node.
A signal sending-and-receiving circuit of a serial-bus device applicable to a plurality of nodes having parent-child relationships, wherein when receiving a Self ID packet from a child node after receiving a Grant signal from a parent node, said signal sending-and-receiving circuit is placed in a stand-by state to block the Grant signal from being transmitted therefrom until receiving an Idle signal from the parent node.
A signal sending-and-receiving circuit of a serial-bus device applicable to a plurality of nodes having parent-child relationships, comprising:
A signal sending-and-receiving circuit of a serial-bus device applicable to a plurality of nodes having parent-child relationships, the signal sending-and-receiving circuit employing a method of a Self ID process comprising the steps of:
A signal sending-and-receiving circuit of a serial-bus device applicable to a plurality of nodes having parent-child relationships, said signal sending-and-receiving circuit employing a method of a Self ID process comprising the steps of:
A control method of a signal sending-and-receiving circuit applicable to a plurality of nodes having parent-child relationships, comprising the steps of:
A control method of a signal sending-and-receiving circuit applicable to a plurality of nodes having parent-child relationships, comprising the steps of:
Dependencies are inferred from the claim text.