Circuit andm ethod for coordinating south-north bridge circuit and CPU at different energy saving state
An energy-saving state, bridge circuit technology, applied in the direction of data processing power supply, etc., can solve problems such as high energy consumption, and achieve the effect of saving energy consumption
Active Publication Date: 2006-07-19
VIA TECH INC
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Problems solved by technology
Therefore, the above-mentioned known technique of waking up the CPU to state C0 to handle the bus mastering request will cause unnecessary high energy consumption
Method used
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[0030] Please refer to figure 1 . figure 1 It is a functional block diagram of the computer system 10 of the present invention. The computer system 10 is provided with a central processing unit 12, a north bridge circuit 14 and a south bridge circuit 16 forming a chipset, a memory 18 as a system memory (such as a dynamic random access memory), a graphics accelerator card 20, and other peripherals. device 22. The central processing unit 12 is used to control the data processing and data calculation of the computer system 10 , and the south bridge circuit 16 and the north bridge circuit 14 manage the data exchange between the central processing unit 12 , the memory 18 and other peripheral devices. Wherein, graphics accelerator card 20 can be regarded as the peripheral device of north bridge circuit 14, is used for processing graphic data, makes the operation situation of computer system 10 can be displayed in the mode of graphic screen; South bridge circuit 16 can be connected...
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The invention provides a kind of telephone and related methods that can moderate the south north bridge circuit and the cpu cutovers and dissimilarities to economize on energy the status. In better implementation instance of the invention, the arrangement that to open the drain electrode establishes between the south north bridge circuit a the indication on line telephone.When the south north bridge circuit wants to handle the main wire total control the request, can distinguish on should indicate the on line telephone the delivery indicates the signal, but open the arrangement of the drain electrode to make should indicate the on line telephone is of south north bridge circuit of the signal energy simultaneous reaction to the situation of transaction that the lord of electric mains controls the request. According to the signal of the indication on line telephone, the south north bridge circuit is can immediately control the cpu cutover in appropriate economy energy status to control the request with the service electric mains lord, don'ting need to be restore by the cpu to the whole function status then can moderate to handle the lord of electric mains to control the request.
Description
technical field [0001] The present invention relates to a circuit and a related method capable of coordinating the switching between the north-south bridge circuit and the central processing unit in different energy-saving states, and in particular to a circuit with a streamlined open-drain architecture indicating the on-line circuit so that the north-south bridge circuit can coordinate the switching of the central processing unit Circuit and related method for supporting bus master service in C2 / C3 power-saving state. Background technique [0002] Computer system is one of the most important hardware foundations of modern information society. In addition to the pursuit of performance, modern computer systems also need to pay attention to the reduction of energy consumption. Therefore, modern information manufacturers also regard reducing energy consumption as one of the key points in the research and development of computer systems. [0003] In the computer system, there ...
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IPC IPC(8): G06F1/32
Inventor 苏耀群林瑞霖魏睿民黄正维
Owner VIA TECH INC