The J700 connector is used for headphone output, with separate pins for right and left audio channels.
How to connect the TAS5508-5142K7EVM board to a TI input-USB board?
The control interface J40 is used to connect the TAS5508-5142K7EVM board to a TI input-USB board.
What does the RESET pin in J40 interface do?
The RESET pin in the J40 interface is a bidirectional system reset pin used to activate a quiet reset, with additional features for reducing click and pop resets.