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Universal serial bus controller and execution method thereof

A technology of a universal serial bus and an execution method, applied in the direction of program control devices, instruments, electrical digital data processing, etc.

Inactive Publication Date: 2014-01-22
PIXART IMAGING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of the above problems, the present invention provides a USB controller and its execution method, by solving at least one problem existing in the prior art

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  • Universal serial bus controller and execution method thereof
  • Universal serial bus controller and execution method thereof
  • Universal serial bus controller and execution method thereof

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Embodiment Construction

[0050] Below in conjunction with accompanying drawing, structural principle and working principle of the present invention are specifically described:

[0051] In the present invention, the external memory is used to store the settings of different sensors or to store the modified program code when the original stored program has errors. Moreover, in the present invention, along with the execution of the set configuration, the program segment to be executed is dynamically loaded into the RAM, so as to reduce the size of the RAM, thereby avoiding that an excessively large RAM expands the size of the entire chip (USB controller) size. In other words, in the present invention, the external memory is read dynamically as the program is executed, so as to load the program code (program segment) to be used from the external memory to the RAM, and then execute the loaded program segment. In this way, program modification can be facilitated, thereby providing a larger program modifica...

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Abstract

The invention provides a universal serial bus controller and an execution method thereof. In the method, an external memory is utilized to store settings of different sensors or store modified program codes when an original stored program has an error; with the execution of set configuration, a program sector to be executed is dynamically loaded to a random access memory of the universal serial bus controller; and therefore, the size of the random access memory is shortened, a larger program modifying space is provided, and an oversize random access memory is prevented from enlarging the size of the whole chip (the universal serial bus controller).

Description

technical field [0001] The present invention relates to a universal serial bus (universal serial bus, USB) controller, in particular to a universal serial bus controller and an execution method thereof. Background technique [0002] In recent years, with the advancement of communication technology, video cameras, also known as network cameras, have been widely used in video conferences or video calls. The network camera mainly includes a sensor, and the sensor can be connected to a personal computer (PC) via a USB. [0003] With the refinement of electronic products, network cameras are often integrated into various electronic products (such as notebook PCs or liquid crystal displays, etc.). Therefore, reducing the size of the webcam is particularly important for reducing the size of electronic products having the webcam. Wherein, reducing the size of the network camera can be achieved by reducing the size of the sensor, USB LSI (large scale integrated circuit, large scale...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/10G06F9/445
Inventor 林碧辉刘祥生
Owner PIXART IMAGING INC