公开(公告)号：US20190236045A1

公开(公告)日：2019-08-01

申请号：US16259623

申请日：2019-01-28

申请人： PROLIFIC TECHNOLOGY INC.

发明人： Tien-Wei YU ,  Cheng-Sheng CHAN ,  Chiun-Shiu CHEN

IPC分类号： G06F13/40 ,  G06F13/42 ,  G06F13/38

CPC分类号： G06F13/4027 ,  G06F13/387 ,  G06F13/4282 ,  G06F2213/0042 ,  G06F2213/3812

摘要： A USB bridge including a first USB port, a second USB port, a microcontroller, and a host-to-host function circuit is provided. The first USB port is coupled to the first USB host. The second USB port is coupled to the second USB host. The microcontroller is coupled to the first and the second USB ports. The microcontroller communicates with the first and the second USB hosts via the first and the second USB ports, such that the first and the second USB hosts respectively simulate the USB ports of the first and the second USB hosts as virtual comports. The host-to-host function circuit is coupled to the microcontroller and configured to perform a host-to-host transmission function by simulating the USB ports as virtual comports.

公开(公告)号：US20210019274A1

公开(公告)日：2021-01-21

申请号：US17039850

申请日：2020-09-30

申请人： PROLIFIC TECHNOLOGY INC.

发明人： Tien-Wei YU ,  Cheng-Sheng CHAN ,  Chiun-Shiu CHEN

IPC分类号： G06F13/40 ,  G06F13/42

摘要： A USB bridge including a first USB port, a second USB port, a microcontroller, and a host-to-host function circuit is provided. The first USB port is coupled to the first USB host. The second USB port is coupled to the second USB host. The microcontroller is coupled to the first and the second USB ports. The microcontroller communicates with the first and the second USB hosts via the first and the second USB ports, such that the first and the second USB hosts respectively simulate the USB ports of the first and the second USB hosts as virtual COM ports. The host-to-host function circuit is coupled to the microcontroller and configured to perform a host-to-host transmission function by simulating the USB ports as virtual COM ports.

公开(公告)号：US20190087375A1

公开(公告)日：2019-03-21

申请号：US16002625

申请日：2018-06-07

申请人： PROLIFIC TECHNOLOGY INC.

发明人： Tien-Wei YU ,  Cheng-Sheng CHAN ,  Chun-Hsu CHEN ,  Ren-Jie DUAN

IPC分类号： G06F13/40 ,  G06F13/42

CPC分类号： G06F13/4027 ,  G06F13/4282 ,  G06F13/4295 ,  G06F2213/0042

摘要： A USB hub includes an upstream port; a first USB device control unit for performing packet format conversion; an FIFO circuit for storing data outputted from the first host; a second USB device control unit for performing packet format conversion; and a plurality of downstream ports. When any one of the downstream ports is coupled to the mobile device, if the first host commands the mobile device to switch to a host role from a device role, the mobile device temporarily disconnects from the USB hub, and the first host commands the USB hub to change an internal routing path. After the mobile device switches to the host role, the first host still performs the host role, and the first USB device control unit performs the device role; the mobile device performs the host role, and the second USB device control unit performs the device role.