Graphics display system with unified memory architecture
AssigneeBroadcom Corporation
InventorsAlexander G. MacInnis, Chengfuh Jeffrey Tang, Xiaodong Xie, James T. Patterson, Greg A. Kranawetter
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Abstract
A graphics display system integrated circuit is used in a set-top box for controlling a television display. The graphics display system processes analog video input, digital video input, and graphics input. The system incorporates a unified memory architecture that is shared by the graphics system, a CPU, and other peripherals. The unified memory architecture uses real time scheduling to service tasks. Critical instant analysis is used to find a schedule for memory usage that does not affect memory requirements of real time tasks while at the same time servicing non-real-time tasks as needed.
Claims1
A method of arbitrating memory requests to access a memory from a plurality of different devices having different priorities, said memory being shared by the devices, said method comprising:
- receiving a memory request from at least one device;
- serving the memory request by allowing an access to the memory by said at least one device;
- and
- enforcing a predetermined interval between the access and a subsequent access to the memory by said at least one device.
Dependencies are inferred from the claim text.