45.1 Components

The audio subsystem is made of the following components. Unless otherwise specified, all except the CLASSD controller are designed to handle audio sample rates up to 192 kHz.

• 2x Synchronous Serial Controller (SSC)
  • The maximum bit clock (TK or RK) speed is 25 MHz in Host or Client mode on both the receiver and the transmitter.
  • As an example, in TDM mode, this corresponds to up to 4x 32-bit channels at 192 kHz, or up to 8x 32-bit channels at 96 kHz.
• 2x Inter-IC Sound Multi Channel Controller (I2SMCC)
  • The maximum bit clock (I2SMCCx_SCK) speed is 25 MHz in both Host and Client modes.
  • In TDM256 mode, this corresponds to 8x 32-bit channels at 96 kHz.
• 1x Low-jitter audio PLL with one dedicated AUDIOCLK output pin
• 1x Stereo Class D Controller (CLASSD)
  • Fixed PWM frequency operation in the 750 to 800 kHz range
  • Targeted to low-end audio applications
  • Embedded interpolation filters to accommodate standard audio sampling rates