TAS2020 datasheet(20/79 Pages) TI2

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Table 6-12. IRQZ pin configuration (continued)

IRQZ_PIN_CFG[1:0]

Configuration

Interrupt generated for 2 to 4ms

every 4ms on any unmasked

latched interrupt

Table 6-13. Retry wait timer

RETRY_WAIT_TIME

Configuration

0 (default)

Retry every 1.5sec

Retry every 100ms

6.4 Feature Description

6.4.1 PurePath™ Console 3 Software

The TAS2020's advanced features and device configuration can be performed using PurePath Console

3 (PPC3) software. The base PPC3 software can be downloaded and installed from TI website. Once

installed the TAS2020 application can be downloaded with-in base PPC3 software. The TAS2020 PPC3

application calculates necessary register coefficients that are described in the following sections so it is highly

recommended to use PPC3 in I2C Mode. The device configurations are optimized using register updates based

on the options selected in PPC3. This is the recommended method to configure the device for best performance.

Once TAS2020 PPC3 application calculates and updates the device, End System Integration tab in PPC3 can

be used to generate files for final system integration.

6.4.2 Playback Signal Path

6.4.2.1 Digital Volume Control and Amplifier Output Level

The gain from audio input to speaker terminals is controlled by setting the amplifier’s analog gain level (AAMP)

and digital volume control (ADVC). Equation 1 calculates the amplifiers output voltage. Amplifier analog gain

setting must be set before powering up the playback channel and must not be changed while the channel is

active. The digital volume control can be modified while the channel is active and also allows for soft volume

ramp up/down feature to allow for smooth transition of output voltage from one level to another.

AMP

dvc

AMP

Input

dBV

(1)

where

• VAMP is the amplifier output voltage in dBV

• Input is the digital input amplitude in dB with respect to 0dBFS

• ADVC is the digital volume control setting, 6dB to -110dB in 0.5dB steps

• AAMP is the amplifier output level setting, -0.071dBV to 12.471dBV in 0.5017dBV steps.

Amplifier output level settings are presented in dBV (dB relative to 1Vrms) with a full scale digital audio input

(0dBFS) and the digital volume control set to 0dB. Note that these levels are not be achievable because of

analog clipping in the amplifier, so the levels must be used to convey gain only.

When AMP_LVL is set to less than 9dBV settings, the playback channel is automatically configured to low noise

mode or receiver mode of operation.

When a change in digital volume control occurs, the device ramps the volume to the new setting based on the

DVC_SLEW_RATE register bits. If DVC_SLEW_RATE is set to 0x7FFFFF, volume ramp is disabled. This can be

used to speed up start up, shutdown and digital volume changes when volume ramp is handled by the system

host. When volume ramp is disabled, the input audio data stream must be held at digital silence during shutdown

and power up of the device to avoid any clicks and pops.

The device can be put in software based mute by setting DVC_LEVEL to 0x000000 setting.

TAS2020

SLASFD4A – AUGUST 2024 – REVISED JULY 2026

www.ti.com

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