Data transfer control device, electronic equipment, and data transfer control method

A data transfer control device for data transfer through a bus, comprising:

• a state controller which controls a plurality of states including a state of a host operation, in which the data transfer control device operates as a role of a host, and a state of a peripheral operation, in which the data transfer control device operates as a role of a peripheral;
• a host controller which is connected with a transceiver, the transceiver including a physical layer circuit and connected with the bus, during the host operation and transfers data as the host;
• a peripheral controller which is connected with the transceiver during the peripheral operation and transfers data as the peripheral;
• and
• a buffer controller which controls access to a packet buffer which stores data transferred by the host controller and the peripheral controller and is used commonly by the host controller and the peripheral controller,
• wherein, during the host operation, a plurality of pipe regions are allocated in the packet buffer and the host controller transfers data between the pipe regions and the endpoints, each of the pipe regions storing data transferred to and from corresponding each of the endpoints, and
• wherein, during the peripheral operation, a plurality of endpoint regions are allocated in the packet buffer and the peripheral controller transfers data between the endpoint regions and the host, each of the endpoint regions storing data transferred to and from the host.

A data transfer control method for data transfer through a bus, the method comprising:

• controlling a plurality of states including a state of a host operation, in which the data transfer control device operates as a role of a host, and a state of a peripheral operation, in which the data transfer control device operates as a role of a peripheral;
• connecting a host controller with a transceiver which includes a physical layer circuit and is connected with the bus during the host operation and transferring data as the host by using the host controller;
• connecting a peripheral controller with the transceiver during the peripheral operation and transferring data as the peripheral by using the peripheral controller;
• commonly using a common register included in a register section during the host operation and the peripheral operation;
• and
• commonly using a packet buffer, which stores data transferred by the host controller and the peripheral controller, by the host controller and the peripheral controller.

A data transfer control method for data transfer through a bus, the method comprising:

• controlling a plurality of states including a state of a host operation, in which a data transfer control device operates as a role of a host, and a state of a peripheral operation, in which the data transfer control device operates as a role of a peripheral;
• connecting a host controller with a transceiver which includes a physical layer circuit and is connected with the bus during the host operation and transferring data as the host by using the host controller;
• connecting a peripheral controller with the transceiver during the peripheral operation and transferring data as the peripheral by using the peripheral controller;
• commonly using a packet buffer, which stores data transferred by the host controller and the peripheral controller, by the host controller and the peripheral controller;
• allocating a plurality of pipe regions in the packet buffer and transferring data between the pipe regions and the endpoints during the host operation, each of the pipe regions storing data transferred to and from corresponding each of the endpoints;
• and
• allocating a plurality of endpoint regions in the packet buffer and transferring data between the endpoint regions and the host during the peripheral operation, each of the endpoint regions storing data transferred to and from the host.