Method for avoiding initialization failure of audio frequency chip

Abstract

The invention provides a method for avoiding the initialization failure of an audio frequency chip. A pin of which the audio frequency chip can reflect an inner voltage level is subjected to voltage detection by an A / D detection function so as to judge whether the audio frequency chip can achieve a charging level for the audio frequency chip to normally work; after the audio frequency chip is guaranteed to achieve the normal charging level, initialization instruction sequences are sent to the audio frequency chip through IIC (Inter IC bus) or SPI (Serial Peripheral Interface) to cause an audio frequency sequence to begin to be initialized. The SVR (support vector regression) / CREF / VREF pin voltage of the audio frequency chip can be detected to determine a timing for initializing the audio frequency chip, and therefore the problem of the unsuccessful initialization of the audio frequency chip due to unstable peripheral power supply voltage and capacitance precision deviation can be effectively avoided. In addition, the sending result of each instruction sequence is checked, a process that all instruction sequences are initialized is carried out again once one sending result fails, so that the initialization instruction sequences can be guaranteed to be sent in an established time sequence, and the audio frequency chip can be guaranteed to enter a normal working state.

Description

technical field [0001] The invention relates to the field of audio electronic devices, in particular to a method for preventing initialization failure of audio chips. Background technique [0002] The audio chip has a corresponding pin to reflect the internal charging level, such as SVR pin, CREF pin, VREF pin (the function is the same, different chips have different names), the charging process of the audio chip is connected to the power supply voltage of VDD and the capacitor connected to the SVR pin The value is directly related to the value, the smaller the power supply voltage, the larger the capacitance connected to the SVR pin, and the longer the charging completion time. The common initialization method of existing audio chips is that during the development period, the length of time from when the MCU (microcontroller) is powered on to the charging of the SVR pin of the audio chip is used as the extended time for the initialization of the audio chip, that is, when th...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for preventing the initialization of the audio chip from failing, so as to avoid the problem that the audio chip is not functioning normally when the audio chip is initialized without determining whether the audio chip has reached the working state

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