Integrated circuit and electric device use thereof

Abstract

The integrated circuit (100) comprises: a shared memory (104) connected to a bus (101); an audio / multiplex / de-multiplex processor (106) accessing the shared memory via the bus; a video processor (105) performing heavy processes accessing the shared memory via the bus; and a local memory (110) accessed by the video processor (105) without passing through the bus. Avoiding latency time caused by access contention, probability that the integrated circuit can complete processes to be done in real time increases. Image data is displayed on the display device smoothly without deterioration of quality of display.

Description

technical field [0001] The present invention relates to integrated circuits and electronic equipment using the same, and in particular to improvements in the integrated circuits having a plurality of processors accessing a shared memory via a bus. Background technique [0002] In recent years, opportunities to manipulate multimedia data consisting of video, audio, and other various data in electronic devices have increased. In the electronic device, a dedicated or general-purpose processor installed therein processes multimedia data. [0003] Here, if the performance of the processor is extremely high, all necessary processing can be performed by only a single high-performance processor regardless of the amount of power consumed. [0004] However, battery drive is the mainstream especially in electronic devices that emphasize mobility (such as mobile phones, PDAs, digital video cameras, digital ordinary cameras, etc.), and it is desired to simultaneously realize Suppress p...

AI Technical Summary

Problems solved by technology

At this point, bus 2 arbitrates these accesses, but the result is latency for the processors waiting for the accesses

[0014] Especially the processing of video processor 4 is more important than audio processor 5 and multiplexing separation processor 6, if video processor 4 can't carry out access to shared memory 3 at high speed, without waiting time, then processing delay, there is certain Cases where responsible processing cannot be completed within the time limit

[0015] In the prior art, the degree of processing responsibility is not considered between processors, and as a whole, real-time performance may be lost

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