Texas Instruments TAA5242EVM-K User manual

EVM User's Guide: TAA5242EVM-K TAD5242EVM-K TAC5142EVM-K

TAC5242EVM-K TAD5142EVM-K

TAx5x42EVM-K Hardware Control Evaluation Module

Description

The TAx5x42EVM-K evaluation module (EVM) allows

the user to test the capabilities of Texas Instruments’

TAC5242; a two-channel hardware control high-

performance Codec, TAC5142 a two-channel

hardware control Codec, TAA5242 a two-channel

hardware control high-performance ADC, TAD5242 a

two-channel hardware control high-performance DAC

or TAD5142 a two-channel hardware control DAC.

The evaluation module is paired with the AC-MB, a

flexible motherboard which provides power, control

and digital audio data to the evaluation module. Other

variants listed are also supported where the user

replaces the U1 unit with the device of interest.

Get Started

1. Order the EVM from TAx5x1x product folder.

2. Download the latest TAx5x1x data sheet.

Features

• High performance Mono/Stereo Codec with

dynamic range: 120 dB DAC and 115 dB ADC

• Standard performance Mono/Stereo Codec with

dynamic range: 106 dB DAC and 102 dB ADC

• On-board microphones provided for voice

recording testing

• Direct access to digital audio signals and control

interface for simple end-system integration

• USB connection to PC provides power, control,

and streaming audio data for easy evaluation

Applications

• AV receivers

•Video conference systems

•IP network camera

• Speakers

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TAx5x42EVM-K Hardware Control Evaluation Module 1

1 Evaluation Module Overview

1.1 Introduction

The TAx5x42EVM is an evaluation module (EVM) designed to demonstrate the performance and functionality

of the TAx5x42 family of devices. This family includes the devices shown in Table 1-1 with differences in

performance and function noted.

Table 1-1. TAx5x42 Hardware Control Family

Device ADC DR (dB) DAC DR (dB) Feature

TAC5242 115 120 Stereo CODEC

TAC5142 102 106 Stereo CODEC

TAA5242 115 NA Stereo ADC

TAD5242 NA 120 Stereo DAC

TAD5142 NA 106 Stereo DAC

This user's guide describes the functionality of TAC5242EVM-K, TAC5142EVM-K, TAA5242EVM-K,

TAD5242EVM-K or TAD5142EVM-K evaluation kit obtainable from ti.com.

1.2 Kit Contents

• TAC5242, TAC5142, TAA5242, TAD5242 or TAD5142 device

• TAx5x42 EVM/daughterboard

• AC-MB Controller/motherboard

1.3 Specification

The TAx5x42EVM-K evaluation module (EVM) paired with the AC-MB, a flexible motherboard which provides

power, control and digital audio data to the evaluation module allows user to record and playback audio signal.

The configuration for the TAC5242, TAC5142, TAA5242, TAD5242 or TAD5142 device is done through the

various Multi-Function pins (MD0 - MD6).

1.4 Device Information

• TAC5242, a hardware control low power stereo audio codec with 115 dB dynamic range ADC, 120 dB

dynamic range DAC.

• TAC5142, a hardware control low power stereo audio codec with 102 dB dynamic range ADC, 106 dB

dynamic range DAC.

• TAA5242, a hardware control low-power stereo audio ADC with 115 dB dynamic range.

• TAD5242, a hardware control low-power stereo audio DAC with 120 dB dynamic range.

• TAD5142, a hardware control low-power stereo audio DAC with 106 dB dynamic range.

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2 Hardware

2.1 Setup

The evaluation kit consists of the TAx5x42EVM daughterboard and the AC-MB controller board. The controller

board is used to provide power, control, and digital audio signals to the evaluation module. The daughterboard

contains the TAx5x42 device and the input output connections.

USB Power

Selection

+5 V

USB Data

USB Vbus

S/PDIF Out

S/PDIF IN

VINL/R

XMOS ASI

9211 ASI

External

Power

+5-V Input

Level

Translator

Buffer

Mux AC-MB ASI EVM ASI

+3.3 V

+1.8 V

+1 V

Power-On Reset

JTAG

IOVDD

Selection

IOVDD

/POR

/RESET_SW

/RESET

EVM

IOVDD

+5 V

MCLK

BCLK

FSYNC

DIN 1-4

DOUT 1-4

/RESET

XMOS

Interface

PCM9211

Interface

Optical Input

Optical Output

Analog Input

USB

XTAG

Power-On Reset

TAC5XXX

4x4

IC ASI

MD0/ADDR

LDO

+3.3 V

INX

+5 V

IOVDD

+1.2 V

AVDD

Selection

+1.8 V

AC_MB EVM

Power Rails

Main

Rest

External ASI

Connector

Digital Audio

Selection Switch

AUDIO INPUT

CONNECTION

AUDIO OUTPUT

CONNECTION

IOVDD

AVDD

OUTX

Master/Slave

Selection

Audio

Configuration 1

Audio

Configuration 2

HPF/Slot Data

Selection

MD1

MD2

MD3

Input Channel

Configuration 2

Input Channel

Configuration 1

Figure 2-1. TAx5x42 EVM Block Diagram

2.2 AC-MB Settings

2.2.1 Audio Serial Interface Settings

The AC-MB provides the digital audio signals to the evaluation module from the universal serial bus (USB),

optical, stereo jack, and external audio serial interface (ASI) header. Figure 2-2 shows a block diagram of the

ASI routing on the AC-MB.

Figure 2-2. AC-MB Audio Interface Block Diagram

Switch SW2 on the AC-MB selects the audio serial bus that interfaces with the PCM6xx0EVM. Next to switch

SW2, the AC-MB has a quick reference table to identify the audio serial interface source options and switch

settings. The AC-MB acts as the Controller for the audio serial interface, with three different modes of operation:

USB, optical or analog, or external ASI.

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TAx5x42EVM-K Hardware Control Evaluation Module 3

The serial interface clocks and data are provided from the USB interface. The sampling rate and format are

determined by the USB audio class driver on the operating system. The default settings for the USB audio

interface are 32-bit frame size, 48-kHz sampling rate, BCLK and FSYNC ratio is 256, and the format is

timedivision multiplexing (TDM).

2.2.1.1 USB Mode

The AC-MB is detected by the OS as an audio device with the name TI USB Audio UAC2.0. Figure 2-3 shows

the AC-MB audio setting for the USB mode of operation.

Figure 2-3. AC-MB USB Audio Setting

2.2.1.2 Optical or Auxiliary Analog Audio Input Mode

Serial interface signals are provided from the PCM9211 digital transceiver, which is capable of sending digital

data to the EVM from an analog input or optical input. Meanwhile, the data from the EVM can be streamed

through the optical output.

Figure 2-4 shows the AC-MB audio setting for the optical and analog mode of operation.

Figure 2-4. AC-MB Optical or Auxiliary Analog Audio Input Setting

The optical output of the AC-MB streams the data captured on the EVM with the format determined by the input

source used. When there is an optical input connected, the LOCK LED must be ON, and the PCM9211 streams

the audio serial interface clocks with the format determined by the optical input frame. The digital data from the

optical input is streamed to the evaluation module. If the optical input is not connected, the PCM9211 captures

the input signal provided through the analog input, and streams the signal to the evaluation module. This feature

can be useful when a digital input digital-to-analog converter (DAC) is connected to the AC-MB, providing an

analog input for quick evaluation. In auxiliary analog audio mode, the audio serial interface format is fixed to a

24-bit, 48-kHz, I2S mode.

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2.2.1.3 External Audio Interface Mode

In this mode, the audio serial interface clocks for the evaluation board are provided through connector J7 from

an external source. This architecture allows an external system to be used for communication with the evaluation

board, such as a different host processor or test equipment (Audio Precision®). The clocks generated from the

USB interface and PCM9211 are isolated with this setting. Figure 2-5 shows the AC-MB audio setting for the

external mode of operation.

Figure 2-5. AC-MB External Audio Interface Setting

Figure 2-6 shows how to connect the external audio interface. Odd numbered pins are signal carrying, and even

numbered pins are connected to ground.

Figure 2-6. AC-MB Connection with External Audio Serial Interface

2.2.2 AC-MB Power Supply

The complete EVM system is powered from a single 5-V power supply. However, the motherboard has different

low-dropout regulators (LDOs) integrated that provide the required power supplies to the different blocks of the

board. Figure 2-7 shows a block diagram depicting the power structure of the AC-MB.

USB Power

Selection

+5 V

USB Vbus

External

Power

+5-V Input

+3.3 V

+1.8 V

+1 V

Power-On Reset

IOVDD

Selection

IOVDD IOVDD

+5 V

USB

+1.2 V

Power Rails

TO EVM

J9 J3

Figure 2-7. Power-Supply Distribution of the AC-MB

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TAx5x42EVM-K Hardware Control Evaluation Module 5

The AC-MB can be powered from the host computer by using the USB 5-V power supply (VBUS) by shorting

header J5, USB POWER. Additionally, the AC-MB can be powered from an external power supply connected to

terminal J4, EXTERNAL POWER. Header J5 must be open for external supply operation. The IOVDD voltage

for the digital signals that is provided to the evaluation module is generated on the motherboard from the main

power supply (USB or external).

The voltage levels available are 1.2V, 1.8 V and 3.3 V, and can be selected via the J9, J3 header IOVDD. For

1.2-V operation, short pin 1 of header J9 and pin 2 of header J3, for 1.8-V operation, short pins 2 and 3 of

header J3; for 3.3-V operation, short pins 1 and 2 of header J3. When the motherboard is fully powered and the

power supplies from the onboard LDOs are correct, the green POWER LED (D3) turns ON. The USB READY

LED indicates that a successful USB communication is established between the AC-MB and the host computer.

2.3 TAx5x42EVM-K Hardware Settings

2.3.1 TAx5x42 EVM Input Hardware Settings

The TAx5x42 evaluation module has several input configuration options and offers extensive flexibility to allow

the user to evaluate the device across multiple operation modes. The different operation modes are highlighted

in this section.

Figure 2-8. TAC5242/TAC5142/TAA5242 EVM Input Architecture for Channel 1 and 2

The IN1 and IN2 input architecture allows these two channels to be quickly configured to support any of

the supported operation modes. The INxP and INxM pins of the TAx5x42 can optionally connect to onboard

microphones for quick evaluation of a microphone in AC- or DC-coupled modes. Jumper configuration details

can be found in Table 2-1.

For TAD5242 or TAD5142, IN1 and IN2 components are not populated.

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Table 2-1. Input Jumper Configuration

Input Terminal Input Mode Installed

Jumpers Uninstalled Jumper Input Swing Topology

IN1 LINE-IN Differential, AC-

coupled J8 J4, J5, J6, J11, J12,

J15, J16, J20, J21 2 VRMS

LINE-IN Single-ended, AC-

coupled J6, J8, J12 (2-3) J4, J5, J11, J15, J16,

J20, J21 1 VRMS

LINE-IN Differential, DC-

coupled J15, J16

J4, J5, J6, J11, J12,

J20, J21, J8 (DUT

MICBIAS is not used)

2 VRMS

LINE-IN Single-ended, DC-

coupled

J6, J12 (2-3),

J15, J16

J4, J5, J11, J20, J21,

J8 (DUT MICBIAS is not

used)

1 VRMS

On-board Electret

Condenser Microphone

(ECM) Differential, AC-

coupled

J4, J5, J8, J11,

J12 (1-2) J6, J15, J16, J20, J21

Refer to

Microphone data

sheet

On-board Electret

Condenser Microphone

(ECM) Single-ended, AC-

coupled

J4, J5, J8, J11,

J12 (2-3) J6, J15, J16, J20, J21

Refer to

Microphone data

sheet

On-board Electret

Condenser Microphone

(ECM) Differential, DC-

coupled

J4, J5, J8, J11,

J12 (1-2), J15,

J16

J6, J20, J21

Refer to

Microphone data

sheet

On-board Electret

Condenser Microphone

(ECM) Single-ended, DC-

coupled

J4, J5, J8, J11,

J12 (2-3), J15,

J16

J6, J20, J21

Refer to

Microphone data

sheet

IN2 LINE-IN Differential, AC-

coupled J8 J7, J9, J13, J14, J17,

J18, J22, J23, J46 2 VRMS

LINE-IN Single-ended, AC-

coupled J7, J8, J14 (2-3) J9, J13, J17, J18, J22,

J23, J46 1 VRMS

LINE-IN Differential, DC-

coupled J17, J18

J7, J9, J13, J14, J22,

J23, J46, J8 (DUT

MICBIAS is not used)

2 VRMS

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TAx5x42EVM-K Hardware Control Evaluation Module 7

Table 2-1. Input Jumper Configuration (continued)

Input Terminal Input Mode Installed

Jumpers Uninstalled Jumper Input Swing Topology

LINE-IN Single-ended, DC-

coupled

J7, J14 (2-3),

J17, J18

J9, J13, J22, J23, J46,

J8 (DUT MICBIAS is not

used)

1 VRMS

On-board Analog MEMS

microphone, AC-coupled J8, J9, J46 J7, J13, J14, J17, J18,

J22, J23

Refer to

Microphone data

sheet

On-board Analog MEMS

microphone, DC-coupled J9, J17, J18, J46

J7, J13, J14, J22, J23,

J8 (DUT MICBIAS is not

used)

Refer to

Microphone data

sheet

2.3.1.1 Line Inputs

For the line input configuration shown in Figure 2-8, the TAx5x42 captures the audio signal provided through

RCA terminals J2 (IN1), J3 (IN2) or header J47 or J48. The RCA white connector is connected to the INxP and

RCA red connector is connected to the INxM. Depending on differential or single-ended configuration, populate

J6 or J7 jumper as described in the Input Jumper Configuration table above accordingly. The input accepted in

AC/DC-Coupled mode is a differential 2-VRMS full-scale audio signal and if a single-ended source is used, the

1-VRMS signal is supported.

2.3.1.2 On-board Microphone Input

For the on-board microphone input configuration shown in Figure 2-8, the TAx5x42 records the audio captured

from the microphones MK1 (ECM) or U5 (Analog MEMS), which is located on the bottom of the board. Electret

Microphone (MK1) is connected to IN1P/M, and MICBIAS is used to power the on-board microphone, so header

J8 must be installed. For MEMS microphone (U5), this can be configured as either a single ended or differential

input and is connected to IN2P/M. There must not be any connections to J2 or J3 while the on-board microphone

is used to preserve the performance of the microphone. A possibility that the gain adjustment can be needed in

the device depends on the microphone sensitivity.

2.3.2 TAx5x42 EVM Output Hardware Settings

The TAx5x42 evaluation module has several output configuration options and offers flexibility to allow the user to

evaluate the device with different load conditions and configurations. The different configurations are highlighted

in this section.

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2.3.2.1 TAx5x42 Analog Audio Output

The EVM analog audio output port provides option for AC/DC-Coupled, filter/filter-less path for easy evaluation.

By default the filter components are not populated.

Figure 2-9. TAC5242/TAC5142/TAD5242/TAD5142 EVM Output Architecture

OUT1 and OUT2 audio output pins have connection options with external load or the on-board load selections. A

pair of RCA connectors, white from OUTP and red from OUTM allow users to connect to external device either

as differential or single ended. Jumper header J36 or J37 needs to be populated if single-ended is desired or

removed otherwise for differential configuration.

Switch SW1 allows users to select respective load for each output pair for 16 Ohm, 604 Ohm or 10K Ohm if

needed. These resistors are for quick evaluation and can be bypassed for actual load. SW1 and the output RCA

connectors are located on the top left hand side shown in co below.

Table 2-2. SW1 Pin

SW1 pin Load Configuration Resistor Rating

1, 4, 7, 10 16 Ohm 0.5 W

2, 5, 8, 11 604 Ohm 0.125 W

3, 6, 9, 12 10 KOhm 0.4 W

Figure 2-10. TAC5242/TAC5142/TAD5242/TAD5142 Analog Output Connections

For TAA5242, OUT1 and OUT2 components are not populated.

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TAx5x42EVM-K Hardware Control Evaluation Module 9

2.3.3 Multi-Function Hardware Configurations

These hardware-control device configurations are set through the Multi-Function Device Pins, MD0 to MD6

setting which is described in the following sections.

MD0

MD1

MD2

MD4

J71

J72

J74

IOVDD

GND

1 2

3 4

5 6

7 8

9 10

J70

TSW-105-07-G-D

GND GND

MD5

J75

IOVDD

GND

AVDD

22kR71

4.70kR70

AVDD

4.70kR72

AVDD

1 2

3 4

5 6

J73

TSW-103-08-G-D

CCLK

GND

IOVDD

MD3

Figure 2-11. Multi-Function Pin Setting

2.3.3.1 MD0 Hardware Configurations

MD0 sets the codec mode as well as the different audio format as shown in the table below for all the device

variants.

Table 2-3. MD0 Setting

Setting Audio Mode & Format

Short to AVDD Supply Controller I2S

Short to Ground Target I2S

Short to AVDD with 4.7KOhm Controller TDM

Short to AVDD with 22KOhm Target LJ

Short to Ground with 4.7KOhm Target TDM

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