In-chip reset system and reset method for system-on-chip chip

Abstract

The invention proposes an in-chip reset system and reset method for a system-on-chip chip. The system comprises an off-chip key reset circuit, an off-chip crystal oscillation circuit, a chip power-on circuit, a crystal oscillation clock control circuit, a reset signal selection circuit, a reset level pulse generation circuit, an asynchronous reset and synchronous release circuit, a control register, an RC clock circuit, a digital frequency division circuit, a clock selection logic circuit, a delay circuit and a clock switching circuit, wherein except the off-chip key reset circuit and the off-chip crystal oscillation circuit, the rest of circuit modules are all integrated in the system-on-chip (SOC) chip. The in-chip reset system and reset method for the system-on-chip chip have the beneficial technical effects that most circuit modules are integrated in the SOC chip, so that the area is reduced and the cost is lowered; and on the basis of not adding additional circuits, an off-chip key reset mode is effectively combined with an in-chip power-on reset mode, so that the reset system is convenient and easy to use.

Description

field of invention [0001] The invention relates to an on-chip system chip reset technology, in particular to an on-chip system chip internal reset system and reset method. Background technique [0002] With the rapid development of integrated circuit technology, the circuit functions in the chip are becoming more and more complex, and more and more functions are integrated in a single chip. Develop towards the systematic direction of multifunctional IP integration. Among them, the system-on-chip (System on Chip, hereinafter referred to as SOC) chip has become the main solution to replace the traditional integrated circuit, and has become an inevitable trend in the development of current microelectronic chip technology. [0003] SOC chips are usually integrated with processors (including CPU, DSP), memory, and various interface control modules. Various functional modules are combined according to a certain connection relationship to form a complex system-on-chip. Usually, a...

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Problems solved by technology

[0005] In order to solve the problem that the chip reset system and method of the SOC chip in the prior art may cause the chip working state to be unstable, or cause the chip working state to be incorrect, etc., the present invention proposes an on-chip reset system and reset method for a system-on-chip chip

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