Patent ID: 11929722
Assignee: REALTEK SEMICONDUCTOR CORPORATION
Field: Basic communication processes (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 5:
6. A control method of an audio control circuit, comprising:
performing an enumeration process with a host device through an universal serial bus (USB) interface circuit;
determining whether the host device is operating in a BIOS stage or an operating system stage according to contents of packets during the enumeration process, wherein the BIOS stage indicates that the host device has not completed operations of recognizing a type of the audio control circuit;
when it is determined that the host device is operating in the BIOS stage, generating a control signal to enable a de-pop circuit; and
when it is determined that the host device is operating in the operating system stage, generating the control signal to disable the de-pop circuit.