DESCRIPTION
Additionally, this device provides high-quality, soft digital volume, bass, and treble control. All control parameters are uploaded from an outside MCU through the I2C slave port or from an external EEPROM through the I2C master port. Each biquad filter has five 24-bit coefficients that can be configured into many different filter functions (such as band-pass, high-pass, and low-pass). The internal loudness contour algorithm can be controlled and programmed with an I2C command. Dynamic range compression/expansion (DRCE) is programmable through the I2C port. The system designer can set the threshold, energy estimation time constant, compression ratio, and attack and decay time constants. The TAS3002 device supports 13 serial interface formats (I2S, left justified, right justified) with data word lengths of 16, 18, 20, or 24 bits. The sampling frequency (fS) may be set to 32 kHz, 44.1 kHz, or 48 kHz. The 13 serial interface formats are listed and described in Section 2.1. The TAS3002 device uses a system clock generated by the internal phase-locked loop (PLL).
Texas Instruments
