Transcription of AN3126 Application note - STMicroelectronics
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AN3126 Application note - STMicroelectronics
July 2020AN3126 Rev 41/231AN3126 Application noteAudio and waveform generation using the DAC in STM32 products IntroductionThis Application note provides some examples for generating audio waveforms using the Digital to Analog Converter (DAC) peripheral embedded in STM32 products (seeTable 1).A digital to analog converter (DAC) is a device with a function opposite to that of an analog to digital converter, it converts a digital word to a corresponding analog STM32 DAC module is a 12-bit word converter, with up to three output channels to support audio DAC can be used in many audio applications such as security alarms, Bluetooth headsets, talking toys, answering machines, man-machine interfaces, and low-cost music STM32 DAC can also be used for many other purposes, such as analog waveform generation and control Application note is organized in two main sections: Section 1 describes the main features of the STM32 DAC module.
for STM32F10x microcontrollers, DAC channel1 is connected to the DMA channel3 and DAC channel2 is connected to DMA channel4. When DMA is not used, the CPU is used to prov ide DAC with the digital code relevant to the waveform to generate. This code is saved in a RAM, or in an embedded NV memory, and
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