公开(公告)号：US20080195770A1

公开(公告)日：2008-08-14

申请号：US11924926

申请日：2007-10-26

Applicant: Hong-Si Wang ,  Chuan-Hui Huang

Inventor： Hong-Si Wang ,  Chuan-Hui Huang

IPC: G06F3/00

CPC classification number: G06F13/4072

Abstract: A USB peripheral device and a method of determining USB speed mode. The method of determining USB speed mode for an USB peripheral device, wherein the USB peripheral device is coupled to an USB host through an USB transmission cable, and the USB transmission cable comprises power and ground lines for power supply, and first and second data signals for transmitting data, the method comprising the USB peripheral device pulling up voltage level of the first data signal with a first pull-up device, the USB peripheral device pulling up voltage level of the second data signal with a second pull-up device, and the USB host determining a high/full speed mode for the USB peripheral device, when detecting only one of the first and second data signals exceeding a threshold, and then detecting the other data signal exceeding the threshold in a predetermined period.

Abstract translation: USB外围设备和确定USB速度模式的方法。 一种用于确定USB外围设备的USB速度模式的方法，其中所述USB外围设备通过USB传输电缆耦合到USB主机，并且所述USB传输电缆包括用于电源的电源线和地线，以及第一和第二数据信号 为了发送数据，所述方法包括：USB外围设备，用第一上拉设备提升第一数据信号的电压电平; USB外围设备用第二上拉设备提升第二数据信号的电压电平;以及 所述USB主机在仅检测到所述第一和第二数据信号中的一个超过阈值时，确定所述USB外围设备的高/全速模式，然后在预定周期内检测超过所述阈值的其他数据信号。

公开(公告)号：US07930441B2

公开(公告)日：2011-04-19

申请号：US11924926

申请日：2007-10-26

Applicant: Hong-Si Wang ,  Chuan-Hui Huang

Inventor： Hong-Si Wang ,  Chuan-Hui Huang

IPC: G06F3/00

CPC classification number: G06F13/4072

Abstract: A USB peripheral device and a method of determining USB speed mode. The method of determining USB speed mode for an USB peripheral device, wherein the USB peripheral device is coupled to an USB host through an USB transmission cable, and the USB transmission cable comprises power and ground lines for power supply, and first and second data signals for transmitting data, the method comprising the USB peripheral device pulling up voltage level of the first data signal with a first pull-up device, the USB peripheral device pulling up voltage level of the second data signal with a second pull-up device, and the USB host determining a high/full speed mode for the USB peripheral device, when detecting only one of the first and second data signals exceeding a threshold, and then detecting the other data signal exceeding the threshold in a predetermined period.

Abstract translation: USB外围设备和确定USB速度模式的方法。 一种用于确定USB外围设备的USB速度模式的方法，其中所述USB外围设备通过USB传输电缆耦合到USB主机，并且所述USB传输电缆包括用于电源的电源线和地线，以及第一和第二数据信号 为了发送数据，所述方法包括：USB外围设备，用第一上拉设备提升第一数据信号的电压电平; USB外围设备用第二上拉设备提升第二数据信号的电压电平;以及 所述USB主机在仅检测到所述第一和第二数据信号中的一个超过阈值时，确定所述USB外围设备的高/全速模式，然后在预定周期内检测超过所述阈值的其他数据信号。