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raspberry:sound_card [2018/08/03 13:11] admin [GPIO use] |
raspberry:sound_card [2018/08/03 13:24] admin [Use of GPIOs] |
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| * for the 4.x kernel [[https:// | * for the 4.x kernel [[https:// | ||
| - | ==== GPIOs use ==== | + | It's recommended **not to use earphones directly** it's not supported.\\ |
| + | |||
| + | ---- | ||
| + | ==== Use of GPIOs ==== | ||
| The following GPIOs are used for the Sound Card:\\ | The following GPIOs are used for the Sound Card:\\ | ||
| For configuration over I2C:\\ | For configuration over I2C:\\ | ||
| Line 13: | Line 16: | ||
| And as the sound interface over I2S:\\ | And as the sound interface over I2S:\\ | ||
| GPIO18 (PCM CLK), GPIO19 (PCM FS), GPIO20 (PCM D-IN), GPIO21 (D-OUT).\\ | GPIO18 (PCM CLK), GPIO19 (PCM FS), GPIO20 (PCM D-IN), GPIO21 (D-OUT).\\ | ||
| + | PCM stands for Pulse-Code Modulation.\\ | ||
| < | < | ||