TAS2120 datasheet(25/63 Pages) TI

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Table 6-16. IRQZ pin configuration (continued)

IRQZ_PIN_CFG[1:0]

Configuration

Interrupt generated for 2 to 4 ms

every 4 ms on any unmasked

latched interrupt

Table 6-17. 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 TAS2120's advanced features and device configuration can be performed using PurePath Console 3(PPC3)

software. The base software PPC3 is downloaded and installed from the TI website. Once installed the TAS2120

application can be downloaded from with-in PPC3. The PCC3 tool calculates necessary register coefficients that

are described in the following sections. The device performance is optimized using registers named TUNING

based on the options for system configuration selected in the GUI. This is the recommended method to configure

the device. Once the TAS2120 application calculates and updates the device, the registers values can be read

back using the PPC3 tool 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 should be set before powering up the playback channel and shouldn't 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 0 dBFS

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

• AAMP is the amplifier output level setting, -0.071dBV to 21.0dBV in 0.5017dBV steps.

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

(0 dBFS) and the digital volume control set to 0 dB. It should be noted that these levels may not be achievable

because of analog clipping in the amplifier, so they should be used to convey gain only.

Table below shows gain settings that can be programmed via the AMP_LVL register. 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.

Table 6-18. Amplifier Output Level Settings

AMP_LVL[5:0]

FULL SCALE OUTPUT

dBV

VPEAK (V)

0x00

21.000

15.9

0x01

20.498

15.0

0x02

19.997

14.1

0x03

19.495

13.3

www.ti.com

TAS2120

SLASFC6 – AUGUST 2024

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