Method and device for implementing system-on-chip wake and sleep function in SOC

Abstract

The invention relates to the integrated circuit field, particularly to a method and a device which are used for realizing wakening and sleeping functions of an on-chip main system in an SOC. When the method and the device are utilized to waken the on-chip main system, the software operating instruction is reduced, and the processing efficiency and the processing speed when wakening are increased. The method of the invention comprises that after receiving a wakening signal, an asynchronous reset signal generator emits a first working signal which triggers an asynchronous reset register to access to the working state, after receiving the first working signal, the asynchronous reset register emits a second working signal which triggers a clock enabled unit to access to the working state, after receiving the second working signal, the clock enabled unit receives a chip main clock signal and transmits the chip main clock signal into a system main clock signal, after that, the clock enabled unit transmits the system main clock signal to the on-chip main system to waken the on-chip main system. The invention simultaneously discloses the device for realizing the wakening and sleeping functions of the on-chip main system in the SOC.

Description

technical field [0001] The invention relates to the field of integrated circuits, in particular to a method and device for realizing wake-up and sleep functions of an on-chip main system in an SOC. Background technique [0002] With the rapid development of integrated circuit technology, customers have more and more demands on consumer electronic products, especially portable electronic products. Since portable electronic products need to be powered by batteries, the power consumption problem is becoming more and more prominent. Nowadays, electronic products take measures at the system level to reduce power consumption, so that the optimization of chip power consumption will be more significant. [0003] Among them, putting the system to sleep is an effective practice. When the entire SOC (system on chip, system on chip) has processed all tasks and will be idle for a long period of time, the main system on chip should enter the sleep state. During sleep, except for the cl...

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Problems solved by technology

[0011] However, the above method must be implemented by software control because the bus write signal becomes high level, so when waking up the system on chip, an instruction for software operation is added, which reduces the efficiency of the wake-up state

[0012] To sum up, at present, when waking up the main system on chip, it must be realized by the combination of software and hardware, thus increasing the instructions of software operation and reducing the efficiency of waking up the state

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