Texas Instruments TLV320DAC26EVM Скачать руководство пользователя страница 7

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Contents

vii

Contents

Introduction

1-1

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1.1

Device Characteristics

1-2

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1.2

EVM Block Diagram

1-2

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1.3

Analog Outputs/Inputs

1-3

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1.4

Power Requirements

1-3

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1.5

Computer Requirements

1-3

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Getting Started

2-1

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2.1

Unpacking the EVM

2-2

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2.2

Default Configuration

2-2

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2.3

Quick Start

2-2

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Operation

3-1

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3.1

Jumpers

3-2

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3.1.1

Differential Microphone Input

3-2

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3.1.2

MIC BIAS Selection

3-2

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3.1.3

EEPROM A1 Select

3-2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.1.4

Power Supply Selection

3-2

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3.1.5

Power Supply Current Measurement

3-3

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3.1.6

IOVDD Voltage Selection

3-3

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3.2

Switches

3-3

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3.2.1

SPI Selection

3-3

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3.2.2

S Selection

3-3

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3.2.3

MCLK Selection

3-4

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3.2.4

USB Reset

3-4

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3.3

I/O Connector and Signals

3-4

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3.3.1

Analog Connectors

3-4

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3.3.2

USB Interface Connector

3-5

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3.3.3

External Power Connectors

3-5

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3.3.4

External Audio Data (I

S) Connector

3-5

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3.3.5

External SPI Connector

3-6

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3.3.6

Analog Input Connector

3-6

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3.4

Circuit Description

3-6

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3.4.1

USB Microprocessor

3-6

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3.4.2

Power Supply

3-7

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3.4.3

Analog Outputs

3-8

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3.5

Program Description

3-8

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3.5.1

3-8

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3.5.2

DAC Configuration Screen

3-11

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3.5.3

DAC Output Filters Screen

3-13

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Содержание TLV320DAC26EVM

Страница 1: ...TLV320DAC26EVM DAC Evaluation Module June 2004 Data Acquisition Products User s Guide SLAU136...

Страница 2: ...ute a license from TI to use such products or services or a warranty or endorsement thereof Use of such information may require a license from a third party under the patents or other intellectual pro...

Страница 3: ...handling or use of the goods Please be aware that the products received may not be regulatory compliant or agency certified FCC UL CE etc Due to the open construction of the product it is the user s r...

Страница 4: ...o the EVM output If there is uncertainty as to the load specification please contact a TI field representative During normal operation some circuit components may have case temperatures greater than 4...

Страница 5: ...ith an introductory chapter that describes the EVM and what it can do To set up the EVM and start testing quickly read at least the first two chapters These two chapters introduce the board and how to...

Страница 6: ...bout this or other Texas Instruments data converter evaluation modules send an e mail to the data converter application team at dataconvapps list ti com Include the product name in the subject heading...

Страница 7: ...Supply Current Measurement 3 3 3 1 6 IOVDD Voltage Selection 3 3 3 2 Switches 3 3 3 2 1 SPI Selection 3 3 3 2 2 I2S Selection 3 3 3 2 3 MCLK Selection 3 4 3 2 4 USB Reset 3 4 3 3 I O Connector and Sig...

Страница 8: ...ters Reading 3 9 3 2 Register Reading Screen With Boost Filter Parameters 3 10 3 3 DAC Configuration Screen 3 11 3 4 DAC Output Filter Screen 3 14 Tables 2 1 Default Configuration Settings 2 2 3 1 Jum...

Страница 9: ...e is for a host processor to control the DAC26 and the DAC data is communicated to the DAC26 over the I2S bus The DAC26 accesses both of these buses through the use of a USB microcontroller which prov...

Страница 10: ...agram TAS1020B MCU and USB Controller J10 4 5 3 3 3 V VREG 1 2 J11 12 11 I2S AUDIO 1 2 J12 12 11 EXT SPI USB J9 6 12 VDC SPI I2S AUDIO ANALOG J6 HEADPHONE OUT J7 OUT J5 MIC IN AUX GND J3 DAC26 MICIN O...

Страница 11: ...l microphone connected to J5 1 4 Power Requirements The DAC26EVM can be powered from either the USB port or an external 6 VDC to 10 VDC power supply 1 5 Computer Requirements The DAC26EVM software is...

Страница 12: ...1 4 THIS PAGE INTENTIONALLY LEFT BLANK...

Страница 13: ...arted Getting Started This chapter provides guidance for unpacking the EVM and setting it up for im mediate operation Topic Page 2 1 Unpacking the EVM 2 2 2 2 Default Configuration 2 2 2 3 Quick Start...

Страница 14: ...Onboard MCLK SW1_2 ON Onboard SPI SW1_3 ON USB reset SW1_4 ON NOTE JMP5 through JMP8 are installed by default These jumpers can be removed and replaced by current meters for evaluating or testing the...

Страница 15: ...Quick Start 2 3 Getting Started Figure 2 1 Default Software Screen...

Страница 16: ...2 4 THIS PAGE INTENTIONALLY LEFT BLANK...

Страница 17: ...function of the DAC26 evaluation kit and how to use the accompanying software to control and use the DAC26 Topic Page 3 1 Jumpers 3 2 3 2 Switches 3 3 3 3 I O Connectors and Signals 3 4 3 4 Circuit De...

Страница 18: ...ophone signal if differential can be connected to the DAC26 through J5 and to the DAC26 MICIN and AUX pins In differential mode JMP1 should be installed 3 1 2 MIC BIAS Selection JMP2 selects the micro...

Страница 19: ...ected ON 3 2 2 SW1 1 OFF External I2S selected ON 3 2 2 SW1 2 ON Onboard MCLK selected ON 3 2 3 SW1 SW1 2 OFF External MCLK selected ON 3 2 3 SW1 SW1 3 ON Onboard SPI selected ON 3 2 1 SW1 3 OFF Exter...

Страница 20: ...ff SW1 4 3 3 I O Connector and Signals The various connectors on the DAC26EVM are described in this section 3 3 1 Analog Connectors The DAC26 analog inputs and outputs are routed through these stereo...

Страница 21: ...tailed in Table 3 5 are provided for the external power Table 3 5 External Power Connectors Reference Designator Description Pin Number Signal Name J9 External power terminal block 1 6 VDC to 10 VDC i...

Страница 22: ...onto the EVM board through terminal block J3 It can also come from the differential jack J5 The pinout is shown in Table 3 8 Table 3 8 Analog Input Connector Reference Designator Description Pin Numbe...

Страница 23: ...ignals for the digital audio can be driven either externally by J11 or by the USB audio controller U5 Do not drive the external I2S bus when the firmware is loaded and the onboard microprocessor is ac...

Страница 24: ...interface Clicking on a tab takes you to the functions associated with that tab The program begins on the Register Reading screen the default as shown in Figure 2 1 The status bar is at the bottom of...

Страница 25: ...Program Description 3 9 Operation Figure 3 1 Register Reading Screen With Control Registers Reading...

Страница 26: ...to reset and reinitialize the DAC26 by clicking them By clicking the button SW Reset a software reset is issued By clicking the button Init DAC26 the control registers for ADC and audio revert back t...

Страница 27: ...e DAC26 there is an on chip phase locked loop PLL The PLL can be enabled or disabled based on the given master clock MCLK to the DAC26 and the required reference frequency FSref for the codec For more...

Страница 28: ...ndent 2 right channel controlled or 3 left channel controlled The DAC s PGA gain can be changed in soft stepping either 0 5 dB per one sample or 0 5 dB per 2 samples The audio DAC s output swing range...

Страница 29: ...control slider The gain change is implemented with zero crossover when enabled by checking the box below the sliders and a possible pop sound may be avoided or reduced 3 5 2 5 Keyclick Section When th...

Страница 30: ...aph by pressing the View Response button It is recommended that you view the response before downloading values to the DAC26 as some values can cause clipping or oscillation of the filter The filter e...

Страница 31: ...l Description Physical Description This chapter contains the component locations bill of materials and the schematics Topic Page 4 1 Component Locations 4 2 4 2 Bill of Materials 4 3 4 3 Schematics 4...

Страница 32: ...Component Locations 4 2 4 1 Component Locations...

Страница 33: ...r Panasonic ERJ 3GEYJ272V 11 4 3 09 K R15 R16 R17 R18 1 16W 1 Chip resistor Panasonic ERJ 3EKF3091V 12 4 100 K R8 R9 R10 R25 1 16W 5 Chip resistor Panasonic ERJ 3GEYJ104V Not Installed 1 R11 1 10W 5 C...

Страница 34: ...ght emitting diode Lumex SML LX0603IW TR Not Installed 4 D5 D6 D7 D8 Schottky barrier diode series configuration Zetex BAT54STA 28 1 MK1 Omnidirectional Microphone Cartridge Knowles Acoustics MD9745AP...

Страница 35: ...ogy ED555 4DS 42 1 J10 2 5 mm Power connector CUI Stack PJ 102B 43 3 J5 J6 J7 3 5 mm Stereo audio jack SMT CUI Stack SJ 3515 SMT 1 44 2 J11 J12 12 Pin double row header 2x6 0 1 Samtec TSW 106 07 L D 4...

Страница 36: ...Schematics 4 6 4 3 Schematics Schematic diagrams of the DAC26EVM showing the DAC26 connections and the USB and connectors are shown on the following pages...

Страница 37: ...EN EXTERNAL INPUTS EXT MIC IN HEADPHONE OUT LINE OUT MICROPHONE X Y X Y X Y X Y 6444323 1 2 J4 ED555 2DS EXTERNAL VREF C10 0 1uF C12 0 1uF C8 0 1uF C9 0 1uF PWD ADWS C11 0 1uF 1 2 JMP1 DIFF MIC INPUT...

Страница 38: ...20 27 4 R21 27 4 C30 47pF C31 47pF 1 2 3 JMP4 PWR SELECT C34 100pF C35 001uF R18 3 09K X1 MA 505 6 000M C0 C32 33pF C33 33pF 3 3V VCC 8 VSS 4 SDA 5 SCL 6 A0 1 A1 2 A2 3 WP 7 U2 24LC64I SN 3 3V C26 1uF...

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Содержание TLV320DAC26EVM

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