TDA7313 Audio Processor Controlled by AVR

Creating a circuit capable of controlling all basic audio settings with the use of buttons and LCD screen is the main concept of this TDA7313 based audio processor.

In the audio industry, the TDA7313 audio processor have been used for quite some time due to its simplicity, functionality, and good parameters such as low noise and low distortion. The Bipolar/CMOS technology is the basis of its structure which makes it suitable for use in various applications like Hi-Fi systems, simple mixers, and car radios. The device is an independent audio processor that can be embedded in any audio system with the ability to control the settings using simple button interface with menu preview in LCD.

The TDA7313 chip allows multiplexing 3 incoming sound sources loudness function, treble & bass control, and volume control with steps of 1.25dB because it has 3 external stereo inputs. The chip can be controlled through I2C (TWI) interface and each of four outputs has distinct control that allows balancing of outputs. For simple and easy reproduction of the circuit, the control board was projected in a single-sided PCB board. The firmware was written for controlling all parameters.

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