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Texas Instruments TLV320AIC26EVM - User guides
TLV320AIC26EVM
Audio Codec Evaluation Module
User’s Guide
March 2004
Data Acquisition Products
SLAU128
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Mailing Address:
Texas Instruments
Post Office Box 655303 Dallas, Texas 75265
Copyright  2004, Texas Instruments Incorporated
EVM IMPORTANT NOTICE
Texas Instruments (TI) provides the enclosed product(s) under the following conditions:
This evaluation kit being sold by TI is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION
PURPOSES ONLY and is not considered by TI to be fit for commercial use. As such, the goods being provided
may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective
considerations, including product safety measures typically found in the end product incorporating the goods.
As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic
compatibility and therefore may not meet the technical requirements of the directive.
Should this evaluation kit not meet the specifications indicated in the EVM User’s Guide, the kit may be returned
within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE
WARRANTY MADE BY SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED,
IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY
PARTICULAR PURPOSE.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user
indemnifies TI from all claims arising from the 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 responsibility to take any and all appropriate precautions with regard to electrostatic
discharge.
EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE
TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not
exclusive.
TI assumes no liability for applications assistance, customer product design, software performance, or
infringement of patents or services described herein.
Please read the EVM User’s Guide and, specifically, the EVM Warnings and Restrictions notice in the EVM
User’s Guide prior to handling the product. This notice contains important safety information about temperatures
and voltages. For further safety concerns, please contact the TI application engineer.
Persons handling the product must have electronics training and observe good laboratory practice standards.
No license is granted under any patent right or other intellectual property right of TI covering or relating to any
machine, process, or combination in which such TI products or services might be or are used.
Mailing Address:
Texas Instruments
Post Office Box 655303
Dallas, Texas 75265
Copyright  2004, Texas Instruments Incorporated
EVM WARNINGS AND RESTRICTIONS
It is important to operate this EVM within the input voltage range of 6 VDC to 10 VDC and the
output voltage range of 3 VDC described in the EVM User’s Guide.
Exceeding the specified input range may cause unexpected operation and/or irreversible
damage to the EVM. If there are questions concerning the input range, please contact a TI
field representative prior to connecting the input power.
Applying loads outside of the specified output range may result in unintended operation and/or
possible permanent damage to the EVM. Please consult the EVM User’s Guide prior to
connecting any load to 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
40°C. The EVM is designed to operate properly with certain components above 40°C as long
as the input and output ranges are maintained. These components include but are not limited
to linear regulators, switching transistors, pass transistors, and current sense resistors. These
types of devices can be identified using the EVM schematic located in the EVM User’s Guide.
When placing measurement probes near these devices during operation, please be aware
that these devices may be very warm to the touch.
Mailing Address:
Texas Instruments
Post Office Box 655303
Dallas, Texas 75265
Copyright  2004, Texas Instruments Incorporated
How to Use This Manual
Preface
Read This First
About This Manual
This users guide describes the function and operation of the TLV320AIC26,
or simply AIC26, audio codec evaluation module. This manual will help you
quickly set up the evaluation board and its accompanying software, so that you
can rapidly test and evaluate the AIC26. A complete circuit description, as well
as schematic diagram and bill of materials are included.
How to Use This Manual
This manual begins with an introductory chapter that describes the EVM and
what it can do. If you are anxious to setup the EVM and start testing, we suggest you read at least the first two chapters. These two chapters introduce you
to the board and how to set it up. Later chapters go into more detail on the
board’s design and how to access its many features.
Information About Cautions and Warnings
This document may contain cautions and warnings.
This is an example of a caution statement.
A caution statement describes a situation that could potentially
damage your software or equipment.
This is an example of a warning statement.
A warning statement describes a situation that could potentially
cause harm to you.
v
Related Documentation From Texas Instruments
The information in a caution or a warning is provided for your protection.
Please read each caution and warning carefully.
Related Documentation From Texas Instruments
To obtain a copy of any of the following TI documents, call the Texas
Instruments literature response center at (800) 477−8924 or the product
information center (PIC) at (972) 644−5580. When ordering, please identify
this booklet by its title and literature number. Updated documents can also be
obtained through the TI website at www.ti.com.
Data Sheets:
Literature Number:
TLV320AIC26
SLAS412
TAS1020B
SLES025A
TPS767D318
SLVS209D
SN74LVC125A
SCAS290M
If You Need Assistance
If you have questions about this or other Texas Instruments data converter
evaluation modules, feel free to e−mail the data converter application team at
dataconvapps@list.ti.com. Include the product name in the subject heading.
FCC Warning
This equipment is intended for use in a laboratory test environment only. It
generates, uses, and can radiate radio frequency energy and has not been
tested for compliance with the limits of computing devices pursuant to subpart
J of part 15 of FCC rules, which are designed to provide reasonable protection
against radio frequency interference. Operation of this equipment in other
environments may cause interference with radio communications, in which
case the user at his own expense will be required to take whatever measures
may be required to correct this interference.
Trademarks
Windows is a registered trademark of Microsoft Corporation.
TouchTek 4 and MicroTouch are trademarks of 3M.
vi
Contents
Contents
1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1
Device Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2
EVM Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3
Analog Inputs/Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4
External Voltage Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5
Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6
Computer Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1
1-2
1-2
1-3
1-3
1-3
1-3
2
Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1
Unpacking the EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2
Default Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3
Quick Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1
2-2
2-2
2-2
3
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1
Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1.1 Differential Microphone Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1.2 MIC BIAS Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1.3 EEPROM A1 Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1.4 Power Supply Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1.5 Power Supply Current Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1.6 IOVDD Voltage Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2
Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.1 SPI Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.2 I2S Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.3 MCLK Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.4 USB Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3
I/O Connector and Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.1 Audio Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.2 USB Interface Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.3 External Power Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.4 External Audio Data (I2S) Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.5 External SPI Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.6 Analog Input Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4
Circuit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4.1 USB Microprocessor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4.2 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4.3 Analog Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4.4 Voltage Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4.5 Audio Interface Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-1
3-2
3-2
3-2
3-2
3-2
3-3
3-3
3-3
3-3
3-4
3-4
3-4
3-5
3-5
3-5
3-6
3-6
3-6
3-7
3-7
3-7
3-8
3-8
3-8
3-8
vii
Contents
3.5
4
Program Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
3.5.1 Data Acquisition Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
3.5.2 Configuration Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
3.5.3 Audio Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
3.5.4 Audio Effects Filter Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19
Physical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1
Component Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2
Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3
Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-1
4-2
4-3
4-6
Figures
1−1
2−1
3−1
3−2
3−3
3−4
3−5
3−6
3−7
3−8
AIC26 Evaluation Kit Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Default Software Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Data Acquisition Screen With ADC Registers Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Data Acquisition Screen With Audio Registers Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
Data Acquisition Screen With Boost Filter Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
Configuration Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
Configuration Screen With External Reference Selection . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
Audio Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
Audio Screen With AGC On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18
Audio Effects Filter Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20
Tables
2−1
3−1
3−2
3−3
3−4
3−5
3−6
3−7
3−8
viii
Default Configuration Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jumper/Function Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Switch Function Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
USB Interface Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External Power Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio Data Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External SPI Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Analog Input Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2
3-2
3-3
3-5
3-5
3-6
3-6
3-6
3-7
Chapter 1
Introduction
The AIC26 is a low power high performance audio codec with mono input and
stereo output. There are two digital interface buses on the AIC26 that communicate with a host processor: the SPI interface and the I2S interface. The SPI
serial interface is for a host processor to control the AIC26, and the audio data
is communicated to the AIC26 over the I2S bus. The AIC26 accesses both of
these buses through the use of a USB microcontroller, which provides a way
to generate data for both buses from a PC running Windowsr 98, Windows
2000, or Windows XP.
Topic
Page
1.1
Device Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1.2
EVM Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1.3
Analog Inputs/Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
1.4
External Voltage Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
1.5
Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
1.6
Computer Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Introduction
1-1
Device Characteristics
1.1 Device Characteristics
The AIC26 is an audio codec with headphone/speaker amplifier and a 12-bit
battery/temperature/auxiliary measurement ADC. The AIC26 has audio
playback and record capabilities. Access to the audio DAC and ADC sections
of the AIC26 is through an I2S interface. The AIC26 interfaces to the host
controller through a standard SPI serial interface. The AIC26 offers two battery
measurement inputs capable of reading battery voltages up to 6 V, while
operating with only a 2.7-V supply. It also has an on-chip temperature sensor
capable of reading 1°C resolution.
1.2 EVM Block Diagram
A block diagram of the AIC26 evaluation kit is shown in Figure 1−1.
Figure 1−1. AIC26 Evaluation Kit Block Diagram
J13
J6
HEADPHONE OUT
Loudspeaker
J7
OUT
External Vref
J5
MIC IN
Vref
SW1
J11 1 2
AUDIO
J4
I2S
5
AIC26
11 12
SPI
4
ANALOG
Buffer
I2S AUDIO
MICIN
On-Board MK1
3
VB1
VB2
AUX
Buffer
J12 1 2
2
TAS1020B
(MCU and
USB Controller)
I2C
Store
EEPROM Firmware
for TAS1020B
VREG
11 12 EXT SPI
USB
J3
GND
1.8 V
3.3 V
J10
J8
2.5 mm
J9
6−10
6−12 VDC
The digital control interface is through either the USB bus or an external SPI
bus. The onboard microprocessor can be disabled, allowing the external SPI
bus to control the AIC26.
Power supplies are derived from the USB bus, or may be provided to the kit
through external connectors from an external user-supplied laboratory power
supply.
1-2
Analog Inputs/Outputs
1.3 Analog Inputs/Outputs
The audio signal comes from either the on-board microphone MK1 or an
external microphone, connected to J5. The audio output is accessed through
connectors J6, J7, and/or terminal block J13. The other analog inputs are
brought onto the board through the J3 terminal block. The AUX input must be
between 0 V and 3.3 V, while the battery inputs, VBAT1 and VBAT2 can range
from 0 V to 6 V.
1.4 External Voltage Reference
If the external voltage reference is used, the reference can be input to the
AIC26 device through the J4 terminal block. The reference (internal or
external) is needed for the AUX, BAT1, or BAT2 ADC measurement.
1.5 Power Requirements
The AIC26EVM can be powered from either the USB port or an external 6-VDC
to 10-VDC power supply.
1.6 Computer Requirements
The AIC26EVM software is designed to run on a PC running Windows
platforms that support USB (Windows 98SE, 2000, XP, etc).
Minimum requirements include:
- IBM-compatible Pentium PC or higher
- Windows 98SE/2000/XP
- 64-MByte RAM minimum
- 20-MByte Available hard disk space
- CD-ROM drive
- USB Port
Introduction
1-3
THIS PAGE INTENTIONALLY LEFT BLANK
1-4
Chapter 2
Getting Started
This chapter guides you through unpacking your EVM and setting it up so you
can begin working with it immediately.
Topic
Page
2.1
Unpacking the EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.2
Default Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.3
Quick Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Getting Started
2-1
Unpacking the EVM
2.1 Unpacking the EVM
When unpacking the AIC26EVM, check to make sure that you received all of
the material that should be in the box. The EVM kit should include the following:
- AIC26EVM board, PWB 6444324
- CD-ROM, 6460667
If any of these components is missing, contact Texas Instruments for a
replacement.
2.2 Default Configuration
The AIC26EVM features a few simple means of configuring its operation. The
default settings for these items are shown in Table 2−1. When you unpack your
AIC26EVM, make sure that your board is initially configured as listed in the
table.
Table 2−1. Default Configuration Settings
Board Identifier
Description
Default Setting
JMP1
Differential MIC input
Not installed
JMP2
MIC BIAS select
2 to 3
JMP3
A1 select for EEPROM
Installed
JMP4
PWR select
1 to 2
JMP9
IOVDD selected as 3.3 V
1 to 2
SW1
On board
TAS1020B enable
On board I2S
SW1_1 ON
On board MCLK
SW1_2 ON
On board 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 corresponding power consumption.
2.3 Quick Start
Once the AIC26EVM has been unpacked and you have verified that the board
is configured as shown in Table 2−1, install the software.
Place the CD-ROM into your PC’s CD-ROM drive. Locate the Setup program
on the disk and run it. The Setup program installs the AIC26EVM software on
your PC. Note that if you are running Windows 2000 or XP, you need administrator privileges to install the software. Follow the instructions that the installer gives you.
When the installation is complete, connect a USB cable from your PC to the
AIC26EVM. You may see a message that a Human Interface /Audio Device
has been connected. Once this connection has been made, launch the
AIC26EVM software on your PC.
The software should automatically find the AIC26EVM. If the board is found,
the screen shown in Figure 2−1 appears.
2-2
Quick Start
Figure 2−1. Default Software Screen
Getting Started
2-3
THIS PAGE INTENTIONALLY LEFT BLANK
2-4
Chapter 3
Operation
This chapter describes each function of the AIC26 evaluation kit and how to
use the accompanying software to control and use the AIC26.
Topic
Page
3.1
Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
3.2
Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
3.3
I/O Connectors and Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
3.4
Circuit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
3.5
Program Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Operation
3-1
Jumpers
3.1 Jumpers
Table 3−1 shows the function of each jumper on the EVM.
Table 3−1. Jumper/Function Reference
Reference
Designator
Setting
Function
Factory Default
Subsection
JMP1
1 to 2
Differential (MICIN and AUX) microphone
input
Not installed
3.1.1
1 to 2
MIC BIAS from fixed resistor
2 to 3
MIC BIAS from AIC26
2 to 3
3.1.2
1 to 2
A1 select for EEPROM
Installed
3.1.3
1 to 2
PWR select: USB powered
2 to 3
PWR select: External power supply
1 to 2
3.1.4
Removed
Power is not provided to AIC26
Installed
Power is provided to AIC26
Installed
3.1.5
1 to 2
AIC26 uses 3.3-V IOVDD
2 to 3
AIC26 uses 1.8-V IOVDD
1 to 2
3.1.6
JMP2
JMP3
JMP4
JMP5 − JMP8
JMP9
3.1.1
Differential Microphone Input
The microphone signal can be input to the AIC26 through the MICIN or AUX,
if the signal is single ended. In single-ended mode, JMP1 should be removed.
The microphone signal, if differential, can be connected to the AIC26 through
J5 and to the AIC26 MICIN and AUX pins. In differential mode, JMP1 should
be installed.
3.1.2
MIC BIAS Selection
JMP2 selects the microphone bias to come from the AIC26 itself or from an
external resistor, R11, which is not installed on the AIC26EVM board. If an
external bias is needed, the appropriate size resistor can be soldered into the
R11 location on the board and JMP2 set to connect between positions 1 and
2. If MIC BIAS is not required, do not install the jumper top for JMP2 in any
position.
3.1.3
EEPROM A1 Select
The AIC26EVM loads its firmware from an onboard EEPROM. In order to use
the firmware in this EEPROM, its address A2, A1, A0 should be 000b. JMP3
is used to pull the A1 line low so that the EEPROM is selected. When A1 is not
low, the EEPROM is not able to interface to the on-board TAS1020B
processor.
This jumper can be removed when firmware updates are to be made.
3.1.4
Power Supply Selection
The AIC26EVM can be powered from the USB port directly, or an external
power supply can be provided through J9 or J10. JMP4 selects between the
USB and external power sources.
3-2
Switches
3.1.5
Power Supply Current Measurement
Four jumpers are on the front of the four power supply pins of the AIC26. The
jumpers can be replaced by current meters that measure and monitor the
currents in the corresponding power supply pins. Refer to Table 2−1 note.
3.1.6
IOVDD Voltage Selection
One of the features of the AIC26 is that the digital IO power supply is flexible
with a range from 1.1 V to 3.6 V. To evaluate the feature, the EVM has the JMP9
jumper for IOVDD selection. If JMP9 is at 1 to 2 position, IOVDD is 3.3 V; if
JMP9 is at 2 to 3, IOVDD is 1.8 V: and without JMP9, an extra power supply
(1.1 V to 3. 6 V) can be connected to IOVDD.
3.2 Switches
The SW1 switch on the board gives users the option to select SPI and I2S as
well as MCLK signal resources.
Table 3−2 shows the function of the switch.
Table 3−2. Switch Function Reference
Reference
Designator
SW1-1
SW1-2
SW1
SW1-3
SW1-4
3.2.1
Setting
Function
ON
On-board I2S selected
OFF
External I2S selected
ON
On-board MCLK selected
OFF
External MCLK selected
ON
On-board SPI selected
OFF
External SPI selected
ON
USB Reset connected to AIC26
OFF
USB Reset not connected to AIC26
Factory
Default
Subsection
ON
3.2.2
ON
3.2.3
ON
3.2.1
ON
3.2.4
SPI Selection
The SPI bus on the AIC26 provides the main interface between a
host-processor and the AIC26 device. The on-board TAS1020B plays the role
of the host processor, if SW1-3 is set ON. If an external processor or SPI device
is used, set the SW1-3 to the OFF position so as to disable the on-board SPI
interface to the TAS1020B and open the AIC26 SPI port to the external SPI
bus.
Operation
3-3
Switches
3.2.2
I2S Selection
The I2S bus on the AIC26 can interface with the onboard host processor, the
TAS1020B USB controller, or with other offboard external I2S processor or
devices. When SW1-1 is set ON, the manufacture default, the AIC26 I2S is
connected to the TAS1020B’s I2S. Otherwise, if SW1-1 is shifted to OFF, the
buffer between the on board I2S port is disabled so that an external I2S can
communicate with the AIC26 I2S port.
3.2.3
MCLK Selection
The AIC26 requires a proper MCLK for basic audio ADC/DAC functions. The
TAS1020B onboard processor generates an 11.2896-MHz frequency to
provide the MCLK. If an external MCLK is preferred, SW1-2 should be turned
off.
3.2.4
USB Reset
A reset signal output from the onboard TAS1020B processor can be used to
reset the the AIC26 whenever the TAS1020B is resetting. SW1−4 is used to
enable/disable the connection. By default, the connection is enabled. If the
processing is not active, the connection to the AIC26 should be disabled by
turning off SW1−4.
3-4
I/O Connector and Signals
3.3 I/O Connector and Signals
The various connectors on the AIC26EVM are described in this section.
3.3.1
Audio Connectors
The AIC26 audio inputs and outputs are routed through these stereo
(TIP/RING/SLEEVE) 3.5-mm jacks. Note the polarity of the channel
assignments for these connectors.
Table 3−3. Audio Connectors
Reference
Designator
Name
Description
J5
Mic In
Microphone input
J6
Headphone
Out
J7
Line Out
J13
3.3.2
-
tip = mic bias voltage (and MIC input−, if different)
-
ring = mic input+
-
sleeve = ground
Stereo headphone audio outputs
-
tip = left channel
-
ring = right channel
-
sleeve = virtual ground
Stereo headphone output with ac coupling
-
tip = left channel
-
ring = right channel
-
sleeve = ground
Loudspeaker When the AIC26 output drive is in high power mode, an 8-Ω loudspeaker can
be connected to J13.
USB Interface Connector
Connection to a USB cable from a PC is made through J8, a standard USB
type B receptacle.
Table 3−4. USB Interface Connector
Reference
Designator
J8
Description
USB slave connection to PC
Pin
Number
Signal Name
Function
1
VCC
+ 5-V supply from USB
2
D−
– Differential USB signal
3
D+
+ Differential USB signal
4
GND
Ground
Operation
3-5
I/O Connector and Signals
3.3.3
External Power Connectors
While it is most convenient to power the AIC26EVM from the USB bus,
external power supplies can be used. The two connectors detailed 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 input
2
Ground
External power jack
−
6 VDC to 10 VDC input, positive center terminal
J10
3.3.4
External Audio Data (I2S) Connector
The I2S bus, which carries audio data to and from the AIC26, is brought out
to header J11 and can be connected to external I2S devices if the I2S interface
to the on-board TAS1020B is disabled.
Table 3−6. Audio Data Connector
Reference Designator
J11
3.3.5
Description
Audio data
(I2S)
connector
Pin Number
Signal Name
1
MCLK
3
BCLK
5
LRCLK
7
I2SDIN
9
I2SDOUT
11
PWD/AWDS
2,4,6,8,10,12
Ground
External SPI Connector
The AIC26 SPI port is brought out to the J12 header. It can be driven by an
external source if the onboard microprocessor is disabled.
Table 3−7. External SPI Connector
Reference
Designator
J12
3-6
Description
External SPI
Bus
Pin
Number
Signal
Name
Function
1
RESET
Reset line
3
SS
Slave select for SPI bus.
5
SCLK
Serial clock for SPI bus.
7
MOSI
Master out, slave in data line for SPI bus. Data
travels to the AIC26 over this line.
9
MISO
Master in, slave out data line for SPI bus. Data
travels from the AIC26 over this line.
11
PENIRQ
AUX, BAT1, BAT2 data available (DAV) interrupt.
2, 4, 6, 8,
10, 12
GND
Ground
Circuit Description
3.3.6
Analog Input Connector
The auxiliary and battery inputs to the touch screen controller are brought onto
the EVM board through terminal block J3. The pinout is shown in Table 3−8.
Table 3−8. Analog Input Connector
Reference
Designator
J3
Description
Battery and auxiliary inputs to the touch
screen control
Pin
Number
Signal
Name
Function
1
VBAT1
Battery input 1, 0 V to 6 V
2
VBAT2
Battery input 2, 0 V to 6 V
3
AUX
Auxiliary input, 0 V to VREF
4
GND
Ground
3.4 Circuit Description
The AIC26 evaluation kit circuitry consists of a USB microprocessor, power
supply circuitry, analog input interfaces, and audio interface circuitry (both
analog and digital). These circuits are described in the following sections.
3.4.1
USB Microprocessor
The AIC26EVM has a USB interface for connecting to a PC. This connection
is made through a TAS1020B streaming audio processor, U5.
The SPI interface to the AIC26 can be controlled from two sources: the
external SPI header, J12, or through the onboard microprocessor (U5) via
USB. The U5 outputs are enabled only when the supplied firmware is loaded
and the TAS SPI switch SW1-3 is turned on. The firmware resides in the serial
EEPROM chip (U2). U5 only loads firmware from U2 when U2’s A1 address
line is pulled low. To disable firmware loading, A1 must be high, by having JM3
removed.
When the firmware is loaded and active, D2 (a yellow LED) is lit.
If no firmware is loaded, U3’s outputs are in 3-state, allowing the external SPI
bus to drive the AIC26 and turn off SW1-3 to ensure the isolation of the
TAS1020B from the SPI bus. When the firmware is loaded, the PC software
enables the microprocessor to control the SPI bus.
Do not drive the external SPI bus when the firmware is loaded and
the onboard microprocessor is active. Disable the microprocessor by removing JMP3, turn off SW1-3, and cycle power to
the AIC26EVM in order to use the external SPI bus.
Each signal from the SPI inputs is connected directly to the AIC26. As such,
signals on these pins must not exceed the power supply voltage of the AIC26,
which is 3.3 V on this EVM.
Likewise, the I2S signals for the digital audio can be driven either externally by
J11 or by the USB audio controller (U5).
Operation
3-7
Circuit Description
Do not drive the external I2S bus when the firmware is loaded and
the onboard microprocessor is active. Disable the microprocessor by removing JMP3, turn off SW1-1 and SW1-2, and cycle
power to the AIC26EVM in order to use the external I2S bus.
3.4.2
Power Supply
Power to the AIC26EVM can be derived directly from the USB interface or
externally supplied through the J9 terminal block or the J10 barrel jack
connector. Supply voltages of 6 VDC to 10 VDC must be supplied from an
external supply. Since it is regulated on the AIC26EVM, this input voltage does
not need to be regulated, as long as it falls within this range. D1 prevents
damage to the board in the event a power supply is connected in reverse
polarity.
U6 regulates the input supply voltage to provide 1.8 V for the AIC26’s digital
core, or the digital IO power supply if the IOVDD is selected as 1.8 V by JMP9.
Also, J3 provides the 3.3 V for the remaining hardware. The regulated supply
voltages have LEDs attached that alert the user that the supply is working. D4
(red) is the indicator for the 1.8-V power supply and D3 (green) is the indicator
for the 3.3-V power supply.
3.4.3
Analog Inputs
Terminal block J3 provides input connection points for the battery and auxiliary
inputs. Battery inputs can range from 0 V to 6 V, and the auxiliary input can
range from 0 V to Vreg.
Each of these three inputs to the AIC26 internal ADC circuitry has a provision
for an RC filter to be placed in line with the signal. As shipped, all of the resistors
are 0 Ω and the capacitor is not installed. If noisy conditions prevent obtaining
good readings from the AIC26, 0.01-µF to 0.1-µF capacitors can be installed
in positions C5 through C7. If more filtering is required, the 0-Ω resistors should
be unsoldered from the board and replaced with small resistors.
3.4.4
Voltage Reference
The AIC26 has an internal voltage reference, selectable at 1.25 V or 2.5 V. If
an external reference is preferred, the external voltage can be input from J4.
3.4.5
Audio Interface Circuitry
A mono electret microphone can be connected to J5. This jack provides both
audio and bias connections. Bias for the microphone can be supplied either
from the AIC26’s mic bias circuitry or from an external resistor (R11). R11 is
not installed on the AIC26EVM, but can be installed by the user. Internal or
external bias is selected by JMP2.
There is also a small on-board microphone on the EVM, parallel to J5. Without
an external electrical microphone, voice can be input to the AIC26 through this
microphone.
The AIC26 has a built-in headphone amplifier. J6 is the jack for connection to
the amplifier and for driving a 16-Ω load at over 25 mW. Also, under audio
3-8
Program Description
output high power mode (refer to the data sheet) an 8-Ω loudspeaker can be
connected to the terminal block J13.
Another audio output jack (J7) is parallel to J6 and provides a secondary
connection to the AIC26 built-in headphone amplifier (with ac coupling).
3.5 Program Description
After installing the software for the AIC26EVM as described in Section 2.3, you
may begin using it to evaluate and develop with the AIC26.
3.5.1
Data Acquisition Screen
The program’s interface is a simple, four-tab interface. Clicking on a tab takes
you to the functions associated with that tab. The program begins on the Data
Acquisition screen (the default) as shown in Figure 2−1.
The status bar is at the bottom of the screen is divided into four sections and
shows the status of communication between the PC and the EVM. Starting
from the left, the first section shows the status of the connection; if an error in
communication occurs, an error message appears here, otherwise it looks as
shown in Figure 2−1. The final section, on the right side of the status bar, shows
the number of readings per second.
When on this screen, the AIC26 is commanded to perform the battery and auxiliary input voltage readings, and then it is commanded to perform a TEMP1
and TEMP2 measurement. These measurements are all repeated twice every
second, and the results are displayed on this screen.
On the right hand side of this screen there is a window that shows the AIC26
internal control register values. The three buttons next to the window selects
which group of control registers is required to be read and shown. The clear
button clears the window contents.
This window is useful for debugging purposes.
Figure 3−1, Figure 3−2, and Figure 3−3 show the AIC26 ADC control registers,
the AIC26 audio control registers, and the AIC26 audio base boost filter coefficients, respectively.
Operation
3-9
Program Description
Figure 3−1. Data Acquisition Screen With ADC Registers Reading
3-10
Program Description
Figure 3−2. Data Acquisition Screen with Audio Registers Reading
Operation
3-11
Program Description
Figure 3−3. Data Acquisition Screen With Boost Filter Parameters
3-12
Program Description
3.5.2
Configuration Screen
This screen provides access to all of the configurable settings for the AIC26’s
A/D converter and reference, as shown in Figure 3−4.
Located on the right hand side of the screen are the programmable phase lock
loop (PLL) settings, which are not the A/D settings but the audio settings.
Figure 3−4. Configuration Screen
3.5.2.1
ADC Control Section
This section controls all of the parameters of the A/D converter. Each slider
controls one parameter, whose value is shown next to the slider. Each slider
is described below.
J
Resolution
Selects between 8-, 10-, and 12-bit resolution.
J
Conversion Clock
The internal clock which runs the A/D converter can run at 8, 4, 2, or 1 MHz.
When running at 8 MHz, only 8-bit resolution is possible; when running at
4 MHz, 8- or 10-bit resolution is possible, but 12-bit is not. These restrictions are reflected in the operation of this program, since only 1- or 2-MHz
clock rates allow 12-bit resolution to be chosen.
Operation
3-13
Program Description
J
Average/Median
There are two ways to reduce noise effect to the ADC result. One is averaging where 2, 4, 8, or 16 readings are averaged, and another option is to
find the median value among 5, 9, or 15 readings.
3.5.2.2
Reference Section
For all nonaudio A/D functions, a reference voltage is needed for the A/D converter. Figure 3−4 shows this section with the AIC26’s internal reference chosen. This reference voltage can be set to either 1.25 V or 2.5 V.
The internal reference powers down between conversions to save power. Using the Powered at all times checkbox, this can be overridden and the reference does not power down. If the reference is allowed to power down, the
AIC26 then must allow a delay time for the reference to power up when a conversion is to take place. This delay time can be set using the slider in this section.
If an external reference is to be used, it can be selected as shown in
Figure 3−5. The value of the external reference should be entered in the text
box shown.
Figure 3−5. Configuration Screen With External Reference Selection
3-14
Program Description
3.5.2.3
Audio PLL Section
On the audio codec part of the AIC26, there is an on-chip phase-lock-loop
(PLL). The PLL can be enabled or disabled, based on the given master clock
(MCLK) to the AIC26 and the required reference frequency (FSref) for the
codec. For more details on the PLL, refer to the AIC26 data sheet.
With the EVM board, the MCLK is at 11.2896 MHz, and the codec sample rate
is also fixed at 44.1 kHz. So no PLL is necessary.
With the AIC26EVM, changing the PLL setting may cause audio
distortions.
3.5.2.4
Reinitialization and Reset
There are two buttons on this screen that allow the user to reset and reinitialize
the AIC26 by clicking these buttons.
By clicking the button SW Reset , a software reset is issued. By clicking the
button
Init AIC26 , the control registers (for ADC and audio) revert back to
the startup (firmware) default settings.
To bring the AIC26 EVM back to its powerup status, you can clicking
SW Reset and followed by
Init AIC26
.
Operation
3-15
Program Description
3.5.3
Audio Screen
The audio functions of the AIC26 can be accessed using the Audio screen
(besides the programmable PLL which is on the configuration screen) as
shown in Figure 3−6.
Figure 3−6. Audio Screen
3-16
Program Description
3.5.3.1
Codec Section
By checking Power Up Codec in the codec section, the audio codec is powered
up.
In this EVM, the audio codec samples at 44.1 kHz in 16-bit I2S mode. Also, the
AIC26 codec functions as a slave in the interface. Although the AIC26 device
has much more flexibility, this EVM has these values fixed.
3.5.3.2
ADC Section
By checking Power Up ADC, audio ADC power is enabled.
The audio ADC also has a high-pass filter which is a submultiple of the sample
rate, to remove dc or low frequency components from the input signal.
The input signal to the audio ADC can come from: 1) the pin MICIN, a
single-ended input; 2) the pin AUX, also a single-ended input; or 3) the pin
MIC2IN and AUX, a differential input, selectable through the Input Select box.
Figure 3−6 shows the single-ended input from MICIN (if selected).
A microphone bias voltage of either 2.5 V or 2.0 V can also be generated by
the AIC26 (refer to Figure 3−6). Note that to use the microphone bias voltage,
jumper JMP2 should be set to position 2 to 3 (refer to Table 3−1 of this
document for jumper settings).
If the differential microphone inputs to the EVM (through the microphone jack
J5) the JMP1 should be installed, and the input select should be set to DIFF
(MIC/AUX) in this section.
In the ADC input path, there is a programmable EVM amplifier (ADC PGA),
allowing analog input gain control from 0 dB to 59 dB. When not using
automatic gain control (AGC OFF), moving the volume slide adjusts the PGA
and checking the Mute box mutes the ADC signal.
When the gain changes from the current value to the programmed value, it
changes in steps of 0.5 dB. Also, the change rate can be controlled if the PGA
Soft Stepping box is checked, where the PGA changes 0.5 dB at either 1 step
per sample or 1 step per 2 samples.
Automatic gain control (AGC) is another more sophisticated way to control the
ADC gain. When the box by AGC ON is checked, AGC is enabled, as shown
in Figure 3−7. Refer to the AIC26 data sheet for setting and using the AGC.
Operation
3-17
Program Description
Figure 3−7. Audio Screen With AGC On
3.5.3.3
DAC Section
Like the ADC section, the AIC26 audio DAC can be powered on or off. By
default, the DAC is powered off. Before a DAC power on, make sure to check
the DAC output mode on the EVM board. If the audio output is connected to
J6 or J13, the virtual GND should be powered up before the DAC powers up.
Otherwise, if the audio output is connected to J7 ( AC coupled plug), the virtual
GND should be powered down before power up.
The stereo audio volumes can be controlled by the left (L) and right (R) volume
control slides, in three different ways, selectable through setting the master
volume controller: 1) independent, 2) right channel controlled, or 3) left
channel controlled.
Like the audio ADC’s gain controls 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 DACs output swing range can be set from the list in the Output
Peak-to-Peak Range pulldown. Refer to the AIC26 data sheet to find out the
range. Note that the output peak-to-peak range is related to the analog driver
power supply voltage.
3-18
Program Description
By checking the Headphone Amp Enable box, the amp is enabled, which can
directly be connected to a 16-Ω load. Otherwise, the headphone driver is
bypassed and the device can have a load of 10 kΩ.
By checking the Power Up Virtual GND box, the virtual ground for the
headphone output is powered up. The virtual ground should be powered
up/down according to the DAC output mode. If the DAC output is in
cap-decoupling mode, the virtual group can be powered down, otherwise the
DAC output is in cap-less mode and the virtual ground should be powered up.
3.5.3.4
Sidetone Section
The AIC26 has an analog sidetone and a digital sidetone circuit. The audio
output of the AIC26 includes a mix of the DAC and the sidetone channels, in
proportion to their respective volume settings.
The analog sidetone is enabled when the PowerUp AnaSideTone box is
checked, and available only if the single-ended MICIN or AUX Input Select is
selected as input to the ADC. Its volume can be adjusted by the analog volume
control slider, ranging from 12 dB to −34.5 dB in 0.5-dB steps. The analog
sidetone is muted when the Mute box under the slider is checked. Additionally,
similar to the audio ADC and DAC, the analog sidetone volume change can
be in soft stepping mode if the corresponding box is checked.
The AIC26’s digital sidetone has three settings. The volume is controlled by
the digital slider, which changes from 0 dB to −48 dB in steps of 1.5 dB. The
digital sidetone can be muted by checking the mute box under the volume
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.
3.5.3.5
Keyclick Section
When the Enable Key Click box is checked, a clicking sound is heard
whenever an audio related setting is selected or checked in the audio screen
or in the PLL section of the configuration screen, or the settings on the Audio
Effects Filters screen (see Figure 3−8).
The volume, frequency, and duration (length) of this keyclick can be adjusted
using the corresponding slider and selectors shown in Figure 3−7.
3.5.4
Audio Effects Filters Screen
The Audio Effects Filters screen displays all of the coefficients for the audio
effects filters of the AIC26, including the bass-boost and other filters, the
de-emphasis filters and the power-up pop noise reduction functions. This
screen is shown in Figure 3−8.
Operation
3-19
Program Description
Figure 3−8. Audio Effects Filter Screen
Different filter coefficients can be loaded for left and right channels, though
usually these are set the same. Six preconfigured filters are selectable using
the drop-down list box of this screen. Selecting one of these updates the
coefficients and causes the graph of the filter response to update. However,
nothing is loaded into the AIC26 until the Download button is pressed.
If changes are made to coefficient values directly, the response can be viewed
on the graph by pressing the View Response button. It is recommended that
you view the response before downloading values to the AIC26, as some
values can cause clipping or oscillation of the filter. The filter equation is
described in the AIC26 data sheet.
Checking the Boost Filter On box enables the filter.
There is another digital filter, the de-emphasis filter, provided by the AIC26 for
the audio DAC. Checking the Deemphasis Filter On box enables the filter.
Moreover, to reduce the AIC26’s power-up pop noise, two pop-reduction
functions were added to the AIC26 and are selectable on this screen. They are
the audio output driver pop-reduction and the audio DAC pop-reduction. Refer
to the data sheet for the details of the pop-reduction features.
3-20
THIS PAGE INTENTIONALLY LEFT BLANK
Operation
3-21
Chapter 4
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Physical Description
4-1
Component Locations
4.1 Component Locations
4-2
Bill of Materials
4.2 Bill of Materials
Item
No.
Qty
Value
Ref Des
Description
Vendor
Part number
1
1
0R0
R3
1/10W 5% Chip resistor
Panasonic
ERJ−6GEY0R00V
Not
Installed
4
0R0
R4, R5,
R6, R7
1/10W 5% Chip resistor
Panasonic
ERJ−6GEY0R00V
2
1
0R0
R12
1/4W 5% Chip resistor
Panasonic
ERJ−8GEY0R00V
3
1
10R
R23
1/16W 5% Chip resistor
Panasonic
ERJ−3GEYJ100V
4
2
27R4
R20, R21
1/16W 1% Chip resistor
Panasonic
ERJ−3EKF27R4V
5
1
220R
R24
1/16W 5% Chip resistor
Panasonic
ERJ−3GEYJ221V
6
2
220R
R1, R2
1/8W 5% Chip resistor
Panasonic
ERJ−6GEYJ221V
7
1
649R
R22
1/16W 1% Chip resistor
Panasonic
ERJ−3EKF6490V
8
1
680R
R14
1/4W 5% Chip resistor
Panasonic
ERJ−8GEYJ681V
9
1
1.5 K
R19
1/16W 5% Chip resistor
Panasonic
ERJ−3GEYJ152V
10
1
2.2 K
R13
1/4W 5% Chip resistor
Panasonic
ERJ−8GEYJ222V
11
3
2.7 K
R26, R27,
R28
1/10W 5% Chip resistor
Panasonic
ERJ−3GEYJ272V
12
4
3.09 K
R15, R16,
R17, R18
1/16W 1% Chip resistor
Panasonic
ERJ−3EKF3091V
13
3
100 K
R8, R9,
R10, R25
1/16W 5% Chip resistor
Panasonic
ERJ−3GEYJ104V
Not
Installed
1
R11
1/10W 5% Chip resistor
Panasonic
14
1
10 K
RA1
1/8W Quad Isolated resistor array
CTS
Corporation
744C083103JTR
15
2
33 pF
C32, C33
50 V Ceramic chip capacitor, ±5%,
NPO
Panasonic
ECJ−1VC1H330J
16
2
47 pF
C30, C31
50 V Ceramic chip capacitor, ±5%,
NPO
Panasonic
ECJ−1VC1H470J
17
1
100 pF
C34
50 V Ceramic chip capacitor, ±5%,
NPO
Panasonic
ECJ−1VC1H101J
18
1
1000 pF
C35
50 V Ceramic chip capacitor, ±5%,
NPO
Panasonic
ECJ−1VC1H102J
19
7
0.1 µF
C8, C9,
C10, C11,
C12, C25,
C40
16 V Ceramic chip capacitor,
±10%, X7R
Panasonic
ECJ−1VB1C104K
20
1
0.1 µF
C24
16 V Ceramic chip capacitor,
±10%, X7R
Panasonic
ECJ−3VB1C104K
Not
Installed
3
0.1 µF
C5, C6,
C7
16 V Ceramic chip capacitor,
±10%, X7R
Panasonic
ECJ−1VB1C104K
21
1
0.33 µF
C39
6.3 V Ceramic chip capacitor,
±10%, X5R
Panasonic
ECJ−1VB0J334K
22
10
1 µF
C26, C27,
C28, C29,
C36, C37,
C38, C42,
C43, C44
6.3 V Ceramic chip capacitor,
±10%, X5R
Panasonic
ECJ−1VB0J105K
Physical Description
4-3
Bill of Materials
Item
No.
Qty
Value
Ref Des
Description
Vendor
Part number
23
8
10 µF
C13, C14,
C15, C18,
C19, C20,
C21, C41
6.3 V Ceramic chip capacitor,
±10%, X5R
Panasonic
ECJ−3YB0J106K
24
3
47 µF
C16, C17,
C22
6.3 V Ceramic chip capacitor,
±20%, X5R
Panasonic
ECJ−4YB0J476M
Not
Installed
1
C23
16 V Ceramic chip capacitor,
±10%, X7R
Panasonic
Not
Installed
4
C1, C2,
C3, C4
16 V Ceramic chip capacitor,
±10%, X7R
Panasonic
ECJ−1VB1C103K
25
1
D1
50 V, 1A, Diode MELF SMD
Micro
Commercial
Components
DL4001
26
1
D2
Yellow light emitting diode
Lumex
SML−LX0603YW−TR
27
1
D3
Green light emitting diode
Lumex
SML−LX0603GW−TR
28
1
D4
Red light emitting diode
Lumex
SML−LX0603IW−TR
Not
Installed
4
D5, D6,
D7, D8
Schottky barrier diode, series
configuration
Zetex
BAT54STA
29
1
MK1
Omnidirectional Microphone
Cartridge
Knowles
Acoustics
MD9745APZ−F
30
1
X1
6 MHz Crystal SMD
Epson
MA−505 6.000M−C0
31
1
U1
Stereo audio CODEC
Texas
Instruments
TLV320AIC26IRHB
32
1
U5
USB streaming controller
Texas
Instruments
TAS1020BPFB
33
1
U6
3.3 V/1.8 V dual output LDO
regulator
Texas
Instruments
TPS767D318PWP
34
2
U3, U4
Quad 3-state buffers
Texas
Instruments
SN74LVC125APW
35
3
U7, U8,
U9
Single IC buffer driver with open
drain O/P
Texas
Instruments
SN74LVC1G07DBVR
36
1
U2
64K 2-Wire Serial EEPROM I2C
Microchip
24LC64I/SN
37
1
N/A
TSC2100EVM/AIC26EVM PWB
Texas
Instruments
6444324
38
10
TP2, TP3,
TP4, TP5,
TP6, TP7,
TP8, TP9,
TP10,
TP11
Miniature test point terminal
Keystone
Electronics
5000
39
1
TP1
Multipurpose test point terminal
Keystone
Electronics
5011
Not
Installed
1
J2
4 Pin right angle latching header
Tyco
Electronics/
AMP
103634−3
41
1
J8
USB Type B slave connector
thru−hole
Mill−Max
897−30−004−90−000000
42
3
J4, J9, J13
2 Position terminal block
On Shore
Technology
ED555/2DS
4-4
0.01 µF
Bill of Materials
Item
No.
Qty
Ref Des
Description
Vendor
Part number
43
1
J3
4 Position terminal block
On Shore
Technology
ED555/4DS
Not
Installed
1
J1
4 Position terminal block
On Shore
Technology
ED555/4DS
44
1
J10
2,5 mm Power connector
CUI Stack
PJ−102B
45
3
J5, J6, J7
3,5 mm Stereo audio jack SMT
CUI Stack
SJ−3515−SMT−1
46
2
J11, J12
12 Pin double row header (2x6)
0.1”
Samtec
TSW−106−07−L−D
47
2
JMP1,
JMP3
2 Position Jumper , 0.1” spacing
Samtec
TSW−102−07−L−S
48
3
JMP2,
JMP4,
JMP9
3 Position Jumper , 0.1” spacing
Samtec
TSW−103−07−L−S
49
4
JMP5,
JMP6,
JMP7,
JMP8
Bus wire
50
1
SW1
SMT, Half-pitch 4 position switch
C&K
Division, ITT
TDA04H0SK1
51
5
N/A
Jumper plug
Samtec
SNT−100−BK−T
52
4
N/A
0.25” x 0.625” Hex 4−40 treaded
standoff
Keystone
Electronics
1808
53
4
N/A
Pan head machine screw
4−40 x 1/2” Phillips
Building
Fasteners
PMS 440 0050 PH
Value
Physical Description
4-5
Schematics
4.3 Schematics
Schematic diagrams of the AIC26EVM showing the AIC26 connections and
the USB and connectors are shown on the following pages.
4-6
1
2
3
4
5
6
Revision History
REV
ECN Number
Approved
D5 through D8 are not installed, but can be added
for extra ESD protection, or for reducing touch
panel noise.
+3.3V
+3.3V
D
2
PLEASE NOTE:
Components within dashed
box are not included on the
AIC26 version of the board.
I2SDOUT
D5B
NI
D6B
NI
D7B
NI
D8B
NI
JMP7
1
D
I2SDIN
C40
LRCLK
D6A
NI
D7A
NI
D8A
NI
C11
0.1uF
0.1uF
BCLK
C41
MCLK
10uF
2
D5A
NI
1
+1.8V
+3.3V
IOVDD
C22
2
J1
X-
0.1uF
C20
X+
10uF
13
12
11
0
R6
0
103634-3
TOUCH SCREEN
14
R7
RESET
PWD/ADWS
26
28
SCLK
MISO
MOSI
SS
PINTDAV
C4
0.01uF
DRVDD
AVDD
HPL
HPR
VGND
4
5
6
7
8
C3
0.01uF
DVSS
C2
0.01uF
R12
TP4
R13
9
10
C24
VBAT1
220
2
R2
3
R3
VBAT2
TSC2100IRHB
TP9
HPR
J6
IOVDD
TP10
100K
TP6
R8
R25
RESET
100K
HPL
SJ-3515-SMT-1
HEADPHONE OUT
RESET
TP11
VGND
1
SS
C1 through C7 are not installed, but can be
added for noise filtering.
GND
2
MOSI
ED555/4DS
EXTERNAL INPUTS
MISO
C5
0.1uF
C6
0.1uF
C7
0.1uF
B
J13
PENIRQ
0
4
MD9745APZ-F
MICROPHONE
TP8
MICIN
PENIRQ
AUX
MK1
NI
TP7
220
B
R14
680
C23
PWDN/AWDS
R1
SJ-3515-SMT-1
EXT MIC IN
.1uF
21
25
23
TP5
1
C
2.2K
MIC BIAS
PWD/ADWS
J3
J5
0
JMP2
1
2
MIC BIAS SEL
3
U1
VREF
1
C1
0.01uF
C21
10uF
24
20
3
31
27
29
30
MICBIAS
MICIN
VBAT1
VBAT2
AUX
0
C10
0.1uF
10uF
DRVSS
AVSS
R5
XY+
X+
Y-
1
2
3
4
22
15
J2
MCLK
BCLK
LRCK
DIN
DOUT
2
0
X+
Y+
XY-
IOVDD
19
18
17
16
R4
C15
C14
10uF
10uF
Y-
ED555/4DS
TOUCH SCREEN
C
0.1uF
32
4
R11
NI
C12
0.1uF
C13
DVDD
3
C9
1
Y+
+3.3V
47uF
1
2
JMP8
1
C8
JMP6
2
JMP5
2
1
JMP1
DIFF. MIC INPUT
C16
47uF
SCLK
TP1
LOUDSPEAKER
8 OHM OUTPUT
C17
47uF
J7
CAUTION!
Do not connect the Loudspeaker
and Line Out jacks at the same
time.
SJ-3515-SMT-1
LINE OUT
J4
1
2
ti
ED555/2DS
EXTERNAL VREF
A
DATA ACQUISITION PRODUCTS
HIGH PERFORMANCE ANALOG DIVISION
SEMICONDUCTOR GROUP
6730 SOUTH TUCSON BLVD., TUCSON, AZ 85706 USA
ENGINEER BOB BENJAMIN
2
3
4
5
TSC2100-AIC26EVM
DRAWN BY BOB BENJAMIN
TOUCH SCREEN CONTROLLER/AUDIO CODEC
DOCUMENT CONTROL NO. 6444323
SIZE B
SHEET 1
1
TITLE
OF
2
DATE 19-Feb-2004
REV C
FILEG:\TSC2100EVM\Schematic\TSC2100EVM.ddb - Documents\TSC2100
6
A
1
2
3
4
5
6
REVISION HISTORY
REV
IOVDD
C36
ENGINEERING CHANGE NUMBER
APPROVED
+3.3V
TP2
D
D
1uF
U3
2
5
9
12
USB MCK 1
4
USB I2S 10
13
+3.3V
SCL
WP
VCC
1Y
2Y
3Y
4Y
GND
C34
46
47
48
1
3
5
6
7
4
16
28
45
100pF
C35
R19
1.5K
R18
.001uF
3.09K
R20
27.4
897-30-004-90-000000
R21
C30
47pF
C31
47pF
P1.7
P1.6
P1.5
P1.4
P1.3
P1.2
P1.1
P1.0
DVDD
DVDD
DVDD
AVDD
5
2
4
6
8
10
12
AUDIO DATA
C43
PWD/ADWS
2
MISO
SN74LVC1G07DBV
MOSI
C38 IOVDD
2
5
9
12
1
4
10
13
+3.3V
SS
1uF
1A
2A
3A
4A
1OE
2OE
3OE
4OE
14
VCC
1
3
5
7
9
11
7
GND
C27
1uF
C28
1uF
C29
1uF
RESET
J12
3
6
8
11
1Y
2Y
3Y
4Y
C
SCLK
2
4
6
8
10
12
EXTERNAL SPI
SN74LVC125APW
+3.3V
IOVDD
R28
2.7K U9
TAS1020BPFB
+3.3V
C44
1uF
3
4
B
1
2
3
4
TAS ENABLE
U4
C37
1uF
8
7
6
5
1uF
R27
2.7K
31
30
29
27
26
25
24
23
8
21
33
2
9
10
11
12
13
14
15
17
18
19
20
22
27.4
XTALO
XTALI
PLLFILI
PLLFILO
MCLKI
PUR
DP
DM
DVSS
DVSS
DVSS
AVSS
MRESET
TEST
EXTEN
RSTO
P3.0
P3.1
P3.2/XINT
P3.3
P3.4
P3.5
NC
NC
GND
D+
DVCC
1
3
5
7
9
11
U8 4
U5
USB I2S
USB MCK
USB SPI
USB RST
J11
2
3
6.00 MHZ
C
4
3
2
1
SW1
+3.3V
MA-505 6.000M-C0
J8 USB SLAVE CONN
LRCLK
7
SN74LVC1G07DBV
IOVDD
X1
2
JMP3
A1 SELECT
44
43
42
41
40
39
37
38
36
35
34
32
1
3.09K
I2SDOUT
1uF
U7 4
SCL
SDA
VREN
RESET
MCLKO2
MCLKO1
CSCLK
CDATO
CDATI
CSYNC
CRESET
CSCHNE
R15
BCLK
C42
C33
33pF
RA1
10K
I2SDIN
IOVDD
R26
2.7K
C32
33pF
14
3
6
8
11
SN74LVC125APW
+3.3V
7
5
VSS
24LC64I/SN
A0
A1
A2
4
1
2
3
C26
1uF
VCC
SDA
U2
8
6
+3.3V
1A
2A
3A
4A
1OE
2OE
3OE
4OE
5
R17
3.09K
5
R16
3.09K
3
TP3
MCLK
2
PENIRQ
SN74LVC1G07DBV
B
D2
R22
649
J9
SML-LX0603YW-TR
YELLOW
USB AUDIO ACTIVE
1
2
U6
5
6
4
ED555/2DS
EXT PWR IN
1
2
3
3
9
6VDC-10VDC IN
JMP4
PWR SELECT
D1
J10
C25
.1uF
10
11
12
DL4001
1IN
1IN
1EN
1GND
2GND
2EN
2IN
2IN
1RESET
1OUT
1OUT
2RESET
2OUT
2OUT
28
24
23
+1.8V
R9
R23
10
100K
R10
22
100K
18
17
D4
C19
10uF
+3.3V
SML-LX0603IW-TR
R24
220
RED
D3
TPS767D318PWP
CUI-STACK PJ102-B
2.5 MM
+3.3V
C39
.33uF
IOVDD +1.8V
ti
SML-LX0603GW-TR
GREEN
C18
10uF
A
1
2
3
JMP9
DATA ACQUISITION PRODUCTS
HIGH PERFORMANCE ANALOG DIVISION
SEMICONDUCTOR GROUP
IOVDD SELECT
6730 SOUTH TUCSON BLVD., TUCSON, AZ 85706 USA
TITLE
ENGINEER BOB BENJAMIN
DRAWN BY BOB BENJAMIN
DOCUMENT CONTROL NO. 6444323
SHEET 2
1
2
3
4
5
OF
2
FILE
SIZE B
TSC2100-AIC26EVM
USB INTERFACE
REV C
DATE 19-Feb-2004
G:\TSC2100EVM\Schematic\TSC2100EVM.ddb - Documents\TSCUSB
6
A
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