Digital Audio Interfaces
5. Verify that the EVM is the default playback device by opening the sound dialog from the Windows
Control Panel as shown in
Figure 2. Setting Default Playback Device
6. Check if the sampling rate matches the Windows setting by opening Properties > Advanced. The EVM
firmware enumerates as a USB-miniEVM that supports 48-kHz sampling rate by default. This setting
must match the EVM at 2 channel, 16 bit, 48000 Hz (CD Quality).
5
Digital Audio Interfaces
The various digital audio interfaces on the TAS2555EVM can be selected through hardware settings and
software settings. Several headers close to the TAS2555 device allow access to the following digital audio
signals:
•
J3: Data out (DOUT) from the TAS2555 (for example, current and voltage sense data)
•
J15: Data in (DIN) to the TAS2555
•
J16: Word clock or frame sync (WCLK)
•
J17: Bit clock (BCLK)
•
J18: Master clock (MCLK) — optional if TAS2555 PLL is not used
J3 has two pins:
•
Digital data (for example, I and V sense data) from the TAS2555 device
•
Ground
J15, J16, J17, and J18 have three pins:
•
Digital audio signals from the EVM
•
Digital audio signals to the TAS2555
•
Ground
A jumper inserted in position 1-2 connects the TAS2555 to the digital audio signals from the board (for
example, USB or Learning Board 2).
Replacing the jumper with a connector from an external source connects the TAS2555 to the external
source (for example, AP or PSIA).
7
SLOU411 – August 2015
TAS2555 Evaluation Module
Copyright © 2015, Texas Instruments Incorporated