Patent ID: 11936229
Assignee: TEXAS INSTRUMENTS INCORPORATED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 15:
16. A method, comprising:
providing a voltage of 2.7 Volts (V) on each of a D+ data pin and a D− data pin of a Universal Serial Bus (USB) connector;
waiting for a voltage on the D− data pin to drop below 2.32V, for a period longer than 500 microseconds (μs);
removing the voltage of 2.7V from each of the D+ and D− data pins;
sinking a current of 25-175 microamps (μA) from the D− data pin to ground for a period of at least 20 μs;
determining a condition, wherein the condition has a true value if a voltage on the D+ data pin is greater than 0.25-0.4V and less than 0.8-2.0V, and the condition has a false value otherwise;
waiting, in response to determining that the condition is false, until the D+ data pin has a voltage less than VLGC; and
providing the voltage of 2.7V on each of the D+ and D− data pins.