tusb1105 D+/D- IN Full-Speed/Low-Speed
时间:10-02
整理:3721RD
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While operating at full speed, the 1.5-k? resistor must be connected between the D+ line and V PU(3.3)
While operating at low speed, the 1.5-k? resistor must to be connected between the D– line and V PU(3.3)
请问 Full-Speed/Low-Speed是否可以自行切换,以及D+/D-同时接上1.5k电阻,在不同模式下是否有影响?
同时接上1.5Kohm的话,那么既不工作在full speed模式,也不工作在low speed模式。不能自行切换。
如果您需要两种工作模式进行切换,可以考虑使用加一个开关,某个时刻只选通一路接通上拉电阻。
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