IUSB[3..1] = "011" is actually USB Suspend and IN operates normally. IUSB[3..1] = "111" is high impedance mode, which effectively disables both inputs.
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IUSB[3..1] = "011" is actually USB Suspend and IN operates normally. IUSB[3..1] = "111" is high impedance mode, which effectively disables both inputs.