SOC key startup and shutdown detection circuit and SOC system

Abstract

The invention discloses an SOC key startup and shutdown detection circuit and an SOC system, and belongs to the technical field of circuit integration. The SOC key startup and shutdown detection circuit comprises a control module and a voltage holding module. The control module adjusts the output voltage according to the on or off state of a key switch to control opening or closing of a chip. Thecontrol module comprises a key element, one end of the key element is connected with an external switch, an internal power supply provides a certain voltage for the control module, the output end of the internal power supply is connected with the other end of the key element, the input end of at least one first inverter element is connected with the other end of the key element, a first input endof a NOR gate element is connected with the output end of the at least one first inverter element, the input end of at least one second inverter element is connected with the output end of the NOR gate element, and the input end of an enabling element is connected with the output end of the second inverter. The output end of the voltage holding module is connected with a second input end of the NOR gate element. According to the invention, the occupied area of the SOC key startup and shutdown detection circuit is reduced, and the power consumption of the SOC chip is reduced.

Description

technical field [0001] The application relates to the technical field of circuit integration, in particular to a SOC key switch detection circuit and an SOC system. Background technique [0002] SOC system-on-chip, also known as system-on-chip, is an integrated circuit with a dedicated target, including a complete system and all embedded software in the SOC chip. During the use of the SOC chip, in order to reduce the power consumption of the SOC chip in the standby state, when the SOC chip is not working in standby, the SOC chip is turned off by turning off the power supply of the SOC chip, thereby reducing the power consumption of the SOC chip in the standby state. consumption. [0003] In the prior art, because there is no related function of turning on and off the SOC chip integrated in the SOC chip, so in the process of turning on or off the SOC chip, a large number of components outside the SOC chip are often used to realize the control of the SOC chip. On or off of t...

AI Technical Summary

Problems solved by technology

Because a large number of external components occupy too much PCB area when used, which leads to a larger size of the final product, which is not conducive to integration

In addition, the use of a large number of external components also increases the cost

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