Implementing hardware interrupt event driven mechanism to offer soft real-time universal serial bus

A method, comprising:

• coupling a host device to a client device via a serial bus;
• generating interrupt data in response to an interrupt event;
• entering an interrupt mode at the direction of the host device;
• after entering the interrupt mode, sending an interrupt request signal to the host device in response to the interrupt data;
• and
• exiting the interrupt mode.

A machine-readable medium on which a plurality of machine instructions are stored that when executed by a machine performs the operations of:

• entering a host device of a serial bus into an interrupt mode;
• sending a set interrupt mode signal from a host device to a client device coupled to the host device, the set interrupt mode signal to indicate to the client device to enter the interrupt mode;
• withholding transmission of a start of frame packet from the host device after sending the set interrupt mode signal for at least a time period equal to a frame duration;
• receiving an interrupt request signal sent from the client device;
• and
• exiting the host device from the interrupt mode.