The PCM1808 module is a stereo audio analog-to-digital converter for line-level signals, with left/right analog inputs and a serial digital audio output. It is typically interfaced with a microcontroller using clock and data lines such as BCK, LRCK, SCKI, and DOUT, and includes mode/power-control pins for configuration.
| Pin | Signal | Description |
|---|---|---|
BCK |
clock | I2S bit clock input/output for shifting audio sample bits. |
GND |
ground | Ground reference for digital signals and power. |
DOUT |
data | I2S serial digital audio data output from the ADC. |
LRCK |
clock | I2S left/right word clock indicating audio channel framing. |
SCKI |
clock | System/master clock input for the PCM1808 ADC. |
3V3 |
power | 3.3 V supply or logic reference for the module. |
5V |
power | 5 V power input for the module regulator or supply circuitry. |
MD0 |
digital | Mode-select input used with MD1 to configure PCM1808 operating mode. |
MD1 |
digital | Mode-select input used with MD0 to configure PCM1808 operating mode. |
FMT |
digital | Digital audio format select pin for the PCM1808 output mode. |
LIN |
analog | Left-channel analog audio input to the ADC. |
RIN |
analog | Right-channel analog audio input to the ADC. |
GND.1 |
ground | Ground return for module power and audio/digital reference. |
3V3.1 |
power | 3.3 V supply rail connection for the ADC module. |
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