Unlock instant, AI-driven research and patent intelligence for your innovation.

DMA controller, system chip possessing layered bus structure and data transmission method

A DMA controller and bus structure technology, applied in the direction of electrical digital data processing, instruments, etc., can solve the problem of different module positions, achieve the effect of improving overall performance, reducing contention, and reducing complexity

Inactive Publication Date: 2008-08-20
北京北大众志微系统科技有限责任公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in SoCs for different applications, due to different application requirements, different data communication modules need to be integrated, and the positions of these modules in the system may be different

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • DMA controller, system chip possessing layered bus structure and data transmission method
  • DMA controller, system chip possessing layered bus structure and data transmission method
  • DMA controller, system chip possessing layered bus structure and data transmission method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] In the application targeted by the present invention, the equipment that needs to complete the DMA transfer with the main memory, such as EMAC and UART, is connected to the system bus and the device bus respectively, such as image 3 As shown, the DMAC directly accesses the connection relationship between the storage controller and each module, as follows:

[0042] With the communication module 5 (such as EMAC) on the system bus 1: the data transmission request is completed through a separate request response connection, and the data transmission is completed through an independent data transmission channel;

[0043] With the communication module 6 (such as USB) on the device bus 2: complete the data transmission request through a separate request response connection, and complete the data transmission by multiplexing the device bus 2;

[0044] With the bridge 3 connecting the system bus 1 and the device bus 2: the judgment of the right to use the device bus 2 is perfor...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention disclosed a DMA controller, a system chip with hierarchical bus structure and its data transmission method. Said DMA controller can be connected with data communication module on system bus by means of request-response connecting wire and data transmission channel, and can be connected with bridge by means of handshaking signal, and connected with equipment bus by means of main equipment interface and connected with data communication module on the equipment bus by means of request-response connecting wire.

Description

technical field [0001] The present invention relates to a DMA (Direct Memory Access, directly accessing storage) controller, a system chip with a hierarchical bus structure and a data transmission method, in particular to a system chip with a hierarchical bus structure, which utilizes a device bus to realize communication with A DMA controller for data transmission by peripheral equipment and its hierarchical bus structure and data transmission method. Background technique [0002] In the traditional system chip, in order to complete the data transmission between each data communication module and the storage, it is necessary to connect the DMAC (Direct Memory Access Controller) module to the system bus, and connect it through a separate request response connection. And a separate data channel for data transmission with each data communication module. For example, if figure 1 As shown, when the USB (Universal Serial Bus, Universal Serial Bus) module on the device bus 2 nee...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/28
Inventor 程旭佟冬王宏伟
Owner 北京北大众志微系统科技有限责任公司