Installation
7
SLOU481A – August 2017 – Revised October 2017
Copyright © 2017, Texas Instruments Incorporated
TAS5755MEVM Evaluation Module
2.1.4
USB Interface
The TAS5755M registers are accessed through I
2
C bus lines SDA and SCL. The USB circuit and USB
connector on the MC57xxPSIA board facilitates the connection between a host computer and the device.
The EVM USB circuit is powered by the 5-V USB line of the host PC and is independent of the power
supplies available on the board. The USB device that is used is a TAS1020B from Texas Instruments.
2.1.5
Digital Audio Interface SPDIF
The Digital Audio Interface SPDIF (RCA, OPTO) accepts digital audio data using the I
2
S protocol. See the
TAS5755M data sheet for more information.
The RCA connector and the OPTO connector are the two SPDIF interfaces on the MC57xxPSIA board.
The jumper JP11 toggles between the OPTO and RCA connector to accommodate the signal source.
When the RCA cable or optical cable is connected and the signal source is powered up, verify that the
SPDIF lock indicator (blue LED5) illuminates, confirming that a viable signal is available to the device.
Install a jumper on JP4 across the middle pin and the pin marked SPDIF to connect the digital source to
SDIN1. Install a jumper on JP5 to connect the digital source to SDIN2.
For detailed information on how the data and clocks are provided to the TAS5755M, see
and
the DIR9001 device data sheet (
).
2.1.6
ADC Interface
In the absence of a digital signal source, the PCM1808 ADC can be used to convert an analog audio
signal to a digital signal to the TAS5755M. The DIR9001 still provides clock signals to the ADC in this
process. A 12-MHz crystal is installed on the MC57xxPSIA board. The ADC is an additional feature of this
board to provide flexibility in sourcing an audio signal to the TAS5755M. Review the PCM1808 data sheet
(
) for a detailed description of the ADC on this EVM. Install the jumper on JP4 and J5 across the
middle pin and the pin marked ADC to select ADC as the source for SDIN1 and SDIN2, and finally, install
JP2 and JP3.
2.1.7
Board Power-Up General Guidelines
Connect the MC57xxPSIA and the TAS5755MEVM boards by locating pin 1 on each board, indicated by a
small white triangle. The MC57xxPSIA plugs down onto the TAS5755MEVM board (that is, the
TAS5755MEVM board fits underneath the MC57xxPSIA board). Pin 1 on each board must be connected
to each other.
Install the EVM software on the PC before powering up the board. After connecting the loudspeakers or
other loads, power supplies, and the data line, power up the 5-V power supply first; then power up the
PVDD power supply.
2.2
Software Installation
Download the
TAS57X1 Graphical Design Environment
(GDE) from the TI Web site, located on the
product page. The TI Web site always has the latest release and any updates to versions
of the GUI.
NOTE:
The TAS5755MEVM is recognized as a TAS5731 device by the GDE software. The
TAS5731 device must be selected in the software when using this EVM.
Execute the GUI install program, Setup.exe. Once the program is installed, the program group and
shortcut icon is created in Start
→
Program
→
Texas Instruments Inc
→
TAS57X1 GDE.
The TAS5731 tab opens when the GUI starts. The TAS5731 tab has two subwindows. One shows the
Process Flow
window. This window also shows
Input
select,
Mode
select,
Channel
, and
Master Volume
.
All functions are shown in the same order as in the device.
The other subwindow, the
Properties
window, has the properties that a user can update by selecting from
the available options. The properties available depend on the device selected.
