Seiko Epson Corporation

Icron Technologies Corporation

Igron Systems Inc.

Keith Kejser

Doug McFadyen

Juraj Bystricky

Juraj Krajci

Devices and methods for generating timing signals at a rate that matches a rate of remotely generated timing signals are provided. In some embodiments, a host generates timing signals in accordance with a USB specification, such as keep-alives, start-of-frame packets, or ITPs. An upstream facing port transmits the timing signals over a network to a downstream facing port. The downstream facing port generates and transmits timing signals to a USB device at a predetermined rate, and alters the predetermined rate based on an analysis of the rate at which timing signals are received from the upstream facing port.

Methods and devices for synchronizing to a remotely generated time base

A system and method for performing an interface save/restore procedure in an electronic device includes a processor that begins to execute a first task in conjunction with a host interface of a display processor. The processor subsequently receives an interrupt request for executing a second task that has a higher priority than the first task. A save/restore module responsively stores task states from the host interface into an interface states register. The task states correspond to an interrupted execution point in the first task. The processor temporarily stops the first task to execute the second task. The save/restore module restores the stored task states to the host interface after the second task is completed, and the processor may then efficiently resume the first task.

Saving/restoring task state data from/to device controller host interface upon command from host processor to handle task interruptions

An apparatus for efficiently filling an image on a display screen through hardware acceleration are provided. One exemplary device includes a display controller. The display controller includes image generation circuitry configured to generate an address and a color for each pixel of an image to be drawn on a display screen. The image generation circuitry includes pen width selection circuitry configured to identify and select coordinates of adjacent and non-overlapping sectors to an initial footprint of the image on the display screen to be drawn. The display controller includes data processing and selection circuitry configured to interface with a central processing unit (CPU) and a memory. The data processing and selection circuitry in communication with the image generation circuitry and configured to receive the address and the color for each pixel of the image. A system and methods for filling an image on a display screen are also provided.

Method and apparatus for filling an image on a display screen

The present invention provides a method and apparatus to be used to extend the range of a standard USB devices. An extended range hub is provided which comprises a Local Expander (LEX) and a Remote Expander (REX) which can be separated by up to, for example 100 metres. The method and apparatus permits USB devices to be more conveniently located and used.

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New Westminster, Canada

Keith Kejser