Clock control method of slave device and baseband chip

Abstract

The invention relates to terminal equipment and discloses a clock control method for slaves and a baseband chip. On and off of a clock of a slave are not controlled by means of software any more but controlled according to statuses of HSEL signals and HTRANS signals. Control is performed from bottom hardware, so that memory modules for storing system codes and external memory controller modules which cannot be switched off by the traditional software method can be switched off, and the process is simple, efficient and riskless and is free of delay required by software in judging. When accessing the slave is not required, on and off of the clock of the slave can be controlled timely, so that system power consumption is lowered greatly.

Description

technical field [0001] The present invention relates to terminal equipment, in particular to power consumption control technology in terminal equipment. Background technique [0002] With the rapid development of communication technology, terminal devices such as mobile phones need to carry more and more types of services, such as mobile Internet access, mobile navigation, high-speed data download / upload, video calls, mobile TV, 3D games, streaming media, etc. , and the realization of these business functions generally requires the close cooperation of various modules inside the baseband chip of the mobile phone, and work at the same time or time-sharing. Obviously, if the functional modules of the mobile phone are simply turned on all the time in the business state, the power consumption of the mobile phone will be very large. Therefore, dynamic clock management needs to turn on only the necessary processor and module clocks according to different services and states, so a...

AI Technical Summary

Problems solved by technology

[0011] However, this simple software-controlled clock method has deficiencies, and it is increasingly unable to meet product and market needs. The summary is as follows:

[0012] (1) The processing is complicated, and it is easy to cause the system to fail: in many cases, there will be more than two masters accessing the same module, which makes the software control very complicated, and if it is not handled properly, the system will fail

[0013] (2) Some module clocks cannot be turned off: some modules cannot be accessed by software, such as the storage space where the code runs, including SOC's on-chip RAM (random access memory) module and SDRAM (synchronous dynamic memory) controller, etc., because the software cannot predict when to call the code on the memory, which cannot be judged in real time and accurately by the software

That is to say, the current software method cannot control the clock shutdown of the slave device in time, and there is a certain delay in time, which increases the power consumption of the system.

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