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tusb1105 D+/D- IN Full-Speed/Low-Speed

kelvin chang
Prodigy 10 points

While operating at full speed, the 1.5-kΩ resistor must be connected between the D+ line and V PU(3.3)

While operating at low speed, the 1.5-kΩ 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？

  • 0
    TI__Guru**** 295050 points

    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。