I2S — Inter-IC sound interface

nRF54L15 | nRF54L10 | nRF54L05 Datasheet

The I2S (Inter-IC Sound) module, supports the original two-channel I2S format, and left- or right-aligned formats. It implements EasyDMA for sample transfer directly to and from RAM without CPU intervention.

The I2S peripheral has the following main features:

  • Master and Slave mode
  • Simultaneous bidirectional (TX and RX) audio streaming
  • Original I2S and left- or right-aligned format
  • 32, 24, 16 and 8-bit sample widths
  • Separate sample and word widths
  • Low-jitter master clock generator
  • Various sample rates
Figure 1. I2S master
I2S block diagram