6.1.1 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.
- 1x 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.
- 1x Inter-IC Sound Multi Channel
Controller (I2SMCC)
- The maximum bit clock (I2SMCC_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