Espressif ESP32 Technical Reference Manual page 648

29 On-Chip Sensors and Analog Signal Processing
Figure 29-10. Cosine Waveform (CW) Generator
29.4.5 DMA support
A DMA controller with dual DMA channels can be used to set the output of two DAC channels. By configuring
SENS_SAR_DAC_DIG_FORCE, I2S_clk can be connected to DAC clk, and I2S_DATA_OUT can be connected to
DAC_DATA for direct memory access.
For details, please refer to chapter DMA.
Espressif Systems 648 ESP32 TRM (Version 5.2)
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