Cx31993 Datasheet Online
The CX31993! That's a interesting part.
USB Differential Pairs (D+/D-):
Connects directly to the USB-C port.
- Power: VBUS (5V), VDDIO (1.8V/3.3V), VDD_CORE (internal regulator output)
- Digital Audio: I2S: BCLK, LRCLK, SDIN (or SDOUT), MCLK
- Control: I2C (SCL, SDA) for register programming
- Analog Output: HPOUT_L, HPOUT_R (direct headphone drive)
- Auxiliary: GPIO for LED, button detection, or jack sense