The ReSpeaker Lite Voice Assistant Kit integrates an ESP32-S3 microcontroller with an XMOS XU316 DSP chip, utilizing I2S interfaces for audio data exchange. The ESP32-S3 employs the following GPIOs for I2S communication:
- GPIO8: BCLK (Bit Clock)
- GPIO7: WS/LRCK (Word Select / Left-Right Clock)
- GPIO43: DOUT (Data Out from ESP32 to XMOS)
- GPIO44: DIN (Data In to ESP32 from XMOS)
However, the specific XMOS XU316 pins corresponding to these signals are not detailed in the available documentation. The ReSpeaker Lite Kit supports two distinct I2S interfaces, each operating in half-duplex mode. This configuration allows for separate handling of voice capture at 16kHz and audio playback at 48kHz, optimizing performance for both tasks. "ReSpeaker Lite" - new Seeed Studio Voice Assistant Development Kit hardware combine ESP32 with XMOS XU316 DSP chip for advanced audio processing as a ESPHome-based Home Assistant Assist Satellite voice devkit - Page 3 - ESPHome - Home Assistant Community