| 摘要 |
The present invention discloses a method for detecting data transmission rate of a USB controller by using a USB device having at least one program storage device, said method comprising steps of: activating an IRQ signal of a timer by using a program; detecting whether said USB controller transmits a signal corresponding to a high-speed USB controller within a pre-determined period of time; if not, setting data transmission in a full-speed mode; if yes, setting data transmission in a high-speed mode.
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