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[USB] 请教:USB2.0 白绿一定要对绞吗?
P:2009-08-13 16:16:30
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6.3 Cable
USB cable consists of four conductors, two power conductors, and two signal conductors.
High-/full-speed cable consists of a signaling twisted pair, VBUS, GND, and an overall shield. High-/fullspeed
cable must be marked to indicate suitability for USB usage (see Section 6.6.2). High-/full-speed
cable may be used with either low-speed, full-speed, or high-speed devices. When high-/full-speed cable is
used with low-speed devices, the cable must meet all low-speed requirements.
Low-speed recommends, but does not require the use of a cable with twisted signaling conductors.
标准规范的内容!!
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