I am using a TUSB2077A hub and am curious what happens to the downstream D+/D- lines during startup.
If power is applied to the hub and no usb host is connected, is there any activity on the D+/D- lines? Driven high, held low?
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I am using a TUSB2077A hub and am curious what happens to the downstream D+/D- lines during startup.
If power is applied to the hub and no usb host is connected, is there any activity on the D+/D- lines? Driven high, held low?