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Control chip and its control method for controlling access external storage module

A technology for external storage and control chips, applied in instruments, electrical digital data processing, etc., can solve problems such as temperature rise, influence, and poor chip operation of the North Bridge 12

Active Publication Date: 2007-08-15
VIA TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current continues to flow through the resistor Ra 1 -Ra n and Rb 1 -Rb n , causing the temperature of Northbridge 12 to rise
When the temperature of the chip rises, the operation of the chip will be adversely affected

Method used

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  • Control chip and its control method for controlling access external storage module
  • Control chip and its control method for controlling access external storage module
  • Control chip and its control method for controlling access external storage module

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Embodiment Construction

[0041] When a chip with ODT function reads data to a data source device, the chip only needs to start the ODT function when the data signal is input, so as to match the impedance of the data line transmitting the data signal, so the present invention is characterized in that it provides dynamic Chip with ODT function. When the chip is in the read cycle, the ODT function is started. When the chip is not in the read cycle, stop the ODT function. By using the invention, the power loss caused by driving the ODT function can be reduced, so that the temperature of the chip can be reduced.

[0042] The present invention can be applied to any chip with ODT function, such as north bridge, south bridge, or storage module. In the following, the working principle of the present invention will be described with regard to the data transmission between the chip with the ODT function and the data source device (such as a storage module). Fig. 4 shows the internal schematic diagram of the n...

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PUM

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Abstract

The control chip for controlling the access of external memory module is used in the reading operation to the data source in read period. The control chip includes at least terminal module and decision unit, the terminal module is connected to the data source device via the memory bus to match the impedance of the memory bus, and the decision unit decides whether to start the terminal module or not based on the terminating signal and the dynamic selection signal. After the terminating signal and the dynamic selection signal is in use, the decision unit starts the terminal module only in the read period.

Description

technical field [0001] The present invention relates to a control chip, in particular to a control chip with a dynamic ODT (On Die Terminator) function. Background technique [0002] In a typical computer system, there are many chips inside it. Each chip is connected to each other by a bus for transferring data between chips. Figure 1 shows a schematic diagram of a computer system. The computer system 10 includes a system chip and a data path chip, which are generally referred to as North Bridge 12 and South Bridge 13 respectively, and are called "bridges" because they connect multiple different buses together. [0003] The north bridge 12 serves as the connection point of the CPU 11 , the storage module 14 , the graphics controller 15 and the south bridge 13 . The north bridge 12 transfers the CPU bus 122 to the storage bus 124 , the AGP graphics bus 126 , and the dedicated interconnection channel 128 with the south bridge 130 . [0004] The south bridge 13 simply puts ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/38
Inventor 叶碧云
Owner VIA TECH INC