| 摘要 |
<p>A method, system and device for a USB data card with U disk function to enter sleep state are provided. The Universal Serial Bus (USB) data card includes two kinds of USB data card configuration information, wherein the first USB data card configuration information is configuration information of the USB data card with U disk function, and the second USB data card configuration information is configuration information of the USB data card without U disk function. At first in the enumeration process with a host, the USB data card sends the first USB data card configuration information to the host, when receiving an instruction for configuration information switching sent by the host, sends the second USB data card configuration information to the host, and then enters sleep state. The USB data card with U disk function can enter sleep state automatically according to USB interface specification, thus the power consumption is reduced.</p> |
