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docs: updates the dac part on ESP32S2.

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Closes https://github.com/espressif/esp-idf/issues/6333
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Michael (XIAO Xufeng)
2020-12-30 09:24:10 +08:00
parent 1760f47681
commit da2be51868
1 changed files with 8 additions and 1 deletions
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9
docs/en/api-reference/peripherals/dac.rst
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@@ -13,7 +13,14 @@ Overview
The DAC driver allows these channels to be set to arbitrary voltages. The DAC driver allows these channels to be set to arbitrary voltages.
The DAC channels can also be driven with DMA-style written sample data, via the :doc:`I2S driver <i2s>` when using the "built-in DAC mode". .. only:: esp32
The DAC channels can also be driven with DMA-style written sample data by the digital controller, via the :doc:`I2S driver <i2s>` when using the "built-in DAC mode".
.. only:: esp32s2
The DAC channels can also be driven with DMA-style written sample data by the digital controller, however the driver does not supported this yet.
For other analog output options, see the :doc:`Sigma-delta Modulation module <sigmadelta>` and the :doc:`LED Control module <ledc>`. Both these modules produce high frequency PWM output, which can be hardware low-pass filtered in order to generate a lower frequency analog output. For other analog output options, see the :doc:`Sigma-delta Modulation module <sigmadelta>` and the :doc:`LED Control module <ledc>`. Both these modules produce high frequency PWM output, which can be hardware low-pass filtered in order to generate a lower frequency analog output.