Method operating wireless device according to power state

A method of operating a wireless device including a power supply source, a controller, and a non-volatile memory unit, the method comprising:

• receiving a wireless signal from a host device, wherein the wireless signal is defined in accordance with a serial data communication protocol;
• extracting a read command from the wireless signal;
• retrieving payload data from the non-volatile memory unit in response to the read command and transmitting the payload data to the host;
• generating a power measurement command by the controller;
• detecting a power state for the power supply source in response to the power measurement command and generating a power state indication based on the detected power state;
• if the power state indication indicates the power state is above a threshold value, continuing the retrieving and transmitting of the payload data until all of the payload data is transmitted;
• and
• if the power state indication indicates the power state is below the threshold value, transmitting a power deficient indication from the wireless device to the host and interrupting the retrieving and transmitting of the payload data.

A method of operating a wireless device using a Wireless Universal Serial Bus (WUSB) protocol, the method comprising:

• receiving data from a host;
• detecting a power state for a power supply source and generating a power state indication based on the detected power state;
• if the power state indication indicates the power state is below the threshold value, transmitting a power deficient state indication from the wireless device to the host for interrupting the transmitting of the data to the wireless device;
• and
• after the transmitting a power deficient indication, if the power state indication indicates the power state increases above the threshold value, transmitting a power sufficient state indication from the wireless device to the host for resuming the transmitting of the data to the wireless device.

A method of operating a wireless device using a Wireless Universal Serial Bus (WUSB) protocol, the method comprising:

• transmitting data to a host;
• detecting a power state for a power supply source and generating a power state indication based on the detected power state;
• if the power state indication indicates the power state is below the threshold value, transmitting a power deficient state indication from the wireless device to the host and interrupting the transmitting of the data;
• and
• after the interrupting the transmitting, if the power state indication indicates the power state increases above the threshold value, resuming the transmitting of the data.