发明授权
US07072989B1 USB peripheral device storing an indication of an operating power mode when a host went into hibernate and restarting at the power mode accordingly
有权
USB外围设备存储当主机进入休眠状态并且在电源模式下重新启动时的工作电源模式的指示
- 专利标题： USB peripheral device storing an indication of an operating power mode when a host went into hibernate and restarting at the power mode accordingly
- 专利标题（中）： USB外围设备存储当主机进入休眠状态并且在电源模式下重新启动时的工作电源模式的指示
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申请号： US10850286申请日： 2004-05-19
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公开(公告)号： US07072989B1公开(公告)日： 2006-07-04
- 发明人: Stephen Henry Kolokowsky , Mark McCoy
- 申请人： Stephen Henry Kolokowsky , Mark McCoy
- 申请人地址： US CA San Jose
- 专利权人： Cypress Semiconductor, Inc.
- 当前专利权人： Cypress Semiconductor, Inc.
- 当前专利权人地址： US CA San Jose
- 代理机构： Marger Johnson & McCollom, P.C.
- 主分类号： G06F13/10
- IPC分类号： G06F13/10
摘要：
A device capable of operating at both a low power mode and at a high power mode which is connected to a host by a USB connection. The device includes a non-volatile memory which stores the operating state of the device when the host goes into hibernate mode and a flag which indicates that the host has entered the “hibernate” mode. When the device powers up, the previous state of the device is read from the memory. If the previous state was high power and the hibernate flag is set, the device restarts in high power mode without the need of any initialization to determine if the host will allow operation at high power speed mode. The device determines that the host is going into suspend mode (rather than power down mode) by determining if a suspend signal on the USB bus is followed by a power down operation.
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