Cypress Semiconductor Corporation

Steve Kolokowsly

Steven Philip Larky

Scott Allen Swindle

Mark D McCoy

A USB device for communicating data from the device to a USB host is provided. The USB device may have an interrupt or isochronous endpoint for communicating interrupts to the host and a bulk data endpoint for communicating bulk data to the host. The USB device may communicate a signal over the interrupt or isochronous endpoint to the host indicating that the device has bulk data to communicate to the host and may communicate bulk data over the bulk endpoint in response to bulk data requests from the host generated based on the signal over the interrupt or isochronous endpoint. The device may count a predetermined period of time when the device is generating a NAK signal in response to the bulk data request signals from the host because the device does not have any bulk data, and may communicate a signal over the bulk endpoint to the host, once the predetermined period of time has elapsed, indicating that the host halts the bulk data requests until another signal over the interrupt or isochronous endpoint is received.

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San Diego, CA, United States of America

Steve Kolokowsly