Abstract: Provided is an arbitration circuit included in a host controller that can be connected to a plurality of external devices via a plurality of pipe control circuits. The arbitration circuit includes an available state information storage unit that stores available state information. The available state information indicates an available state of the plurality of pipe control circuits and is updated by the pipe control circuit by a unit of data transfer of a predetermined communication size. The arbitration circuit further includes an arbitration unit that refers to the available state information storage unit, selects the arbitrary pipe control circuit from the available pipe control circuit, and allocates the selected pipe control circuit to the external device, while updating the available state information storage unit.

Abstract: Provided is an arbitration circuit included in a host controller that can be connected to a plurality of external devices via a plurality of pipe control circuits. The arbitration circuit includes an available state information storage unit that stores available state information. The available state information indicates an available state of the plurality of pipe control circuits and is updated by the pipe control circuit by a unit of data transfer of a predetermined communication size. The arbitration circuit further includes an arbitration unit that refers to the available state information storage unit, selects the arbitrary pipe control circuit from the available pipe control circuit, and allocates the selected pipe control circuit to the external device, while updating the available state information storage unit.

Abstract: The present invention aims to provide a USB host controller capable of reducing time for a data transfer between storage devices. A USB host controller according to the present invention includes a buffer memory for USB pipe having a first buffer memory region and a second buffer memory region, and a buffer memory controller configured to control a data transfer between the buffer memory for USB pipe and each of first and second devices. The buffer memory controller stores data from the first device in the first buffer memory region, swaps address information corresponding to the first buffer memory region and address information corresponding to the second buffer memory region, and transfers data stored in the first buffer memory region to the second device, on the basis of the address information corresponding to the first buffer memory region after the swapping.

Abstract: Provided is an arbitration circuit included in a host controller that can be connected to a plurality of external devices via a plurality of pipe control circuits. The arbitration circuit includes an available state information storage unit that stores available state information. The available state information indicates an available state of the plurality of pipe control circuits and is updated by the pipe control circuit by a unit of data transfer of a predetermined communication size. The arbitration circuit further includes an arbitration unit that refers to the available state information storage unit, selects the arbitrary pipe control circuit from the available pipe control circuit, and allocates the selected pipe control circuit to the external device, while updating the available state information storage unit.

Abstract: The present invention aims to provide a USB host controller capable of reducing time for a data transfer between storage devices. A USB host controller according to the present invention includes a buffer memory for USB pipe having a first buffer memory region and a second buffer memory region, and a buffer memory controller configured to control a data transfer between the buffer memory for USB pipe and each of first and second devices. The buffer memory controller stores data from the first device in the first buffer memory region, swaps address information corresponding to the first buffer memory region and address information corresponding to the second buffer memory region, and transfers data stored in the first buffer memory region to the second device, on the basis of the address information corresponding to the first buffer memory region after the swapping.

Abstract: An apparatus for automatically measuring dust concentration in flue gas includes (a) a sampling unit for sampling dust in flue gas; (b) a measuring unit for measuring a gas flow of the flue gas; and (c) a feeding and weighing unit for feeding and weighing a filter paper for filtering the sampled gas, the feeding and weighing unit including (i) a filter paper cassette for storing the filter paper, (ii) a filter paper stocker for storing a plurality of the filter paper cassettes, (iii) a cassette pusher unit for pushing a filter paper cassette out of the filter paper stocker, (iv) a filter paper ascending unit for raising the filter paper, (v) a filter paper drier for drying the filter paper, (vi) a filter paper transfer arm for transferring the filter paper between the filter paper cassette, the filter paper ascending unit and the filter paper drier, (vii) a vibration-free balance for balancing the filter paper, and (viii) a hot air generation unit.