Texas Instruments BUF08821EVM User Manual
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Texas Instruments BUF08821EVM User Manual

Texas Instruments BUF08821EVM User Manual

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BUF08821EVM Evaluation Board and Software Tutorial
This user's guide describes the characteristics, operation, and use of the BUF08821EVM evaluation
board. It discusses how to set up and configure the software and hardware, and reviews various aspects
of the program operation. Throughout this document, the terms evaluation board, evaluation module, and
EVM are synonymous with the BUF08821EVM. This user's guide also includes information regarding
operating procedures and input/output connections, an electrical schematic, PCB layout drawings, and a
parts list for the EVM.
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Pentium is a registered trademark of Intel Corporation.
Microsoft, Windows are registered trademarks of Microsoft Corporation.
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C is a trademark of NXP Semiconductors, Inc.
All other trademarks are the property of their respective owners.
SBOU066 - September 2008
Submit Documentation Feedback
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BUF08821EVM Evaluation Board and Software Tutorial
User's Guide
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Summary of Contents for Texas Instruments BUF08821EVM

  • Page 1: Table Of Contents

    SBOU066 – September 2008 BUF08821EVM Evaluation Board and Software Tutorial This user's guide describes the characteristics, operation, and use of the BUF08821EVM evaluation board. It discusses how to set up and configure the software and hardware, and reviews various aspects of the program operation.

  • Page 2: Overview

    BUF08821 under various signal, reference, and supply conditions. This document gives a general overview of the BUF08821EVM, and provides a general description of the features and functions to be considered while using this evaluation module. Unpacking the EVM Upon opening the BUF08821EVM kit, please check to make sure that the following items are included: •...

  • Page 3: Buf08821Evm Software Installation

    Installation The BUF08821EVM software is included on the CD that is shipped with the EVM. It is also available through the BUF08821EVM product folder on the TI web site at www.ti.com. To download the software to your system, insert the disc into an an available CD-ROM drive. Navigate to the drive contents and open the BUF08821EVM software folder.

  • Page 4: Buf08821Evm Software About Button

    BUF08821EVM Software www.ti.com The BUF08821EVM software allows the user to read and write to all registers in the BUF08821 gamma correction buffer. Furthermore, it allows programming of the OTP register on the BUF08821. The software also permits the user to select either I C™...

  • Page 5: Evm Operation

    EVM Operation www.ti.com EVM Operation Figure 4 shows the BUF08821EVM with the test point, switch, and jumper locations noted. Figure 4. BUF08821EVM Switch and Jumper Locations SBOU066 – September 2008 BUF08821EVM Evaluation Board and Software Tutorial Submit Documentation Feedback...

  • Page 6: Bksel Switch

    A0 = '1'. Set for Logic ‘1’ Software set for A0 = 1 Figure 6. BUF08821EVM Jumper JP1 Set for Logic '1' When JP1 is in the position shown in Figure 7, A0 on the BUF08821 is connected to GND (logic '0'). Note...

  • Page 7: Buf08821Evm Jumper Jp2 Set For Bksel Switching

    BKSEL In this position, memory banks switched according to external signal applied via connector Figure 9. BUF08821EVM Jumper JP2 Set for External Signal Switching SBOU066 – September 2008 BUF08821EVM Evaluation Board and Software Tutorial Submit Documentation Feedback...

  • Page 8: Using The Buf08821Evm Software

    Using the BUF08821EVM Software www.ti.com Using the BUF08821EVM Software Figure 10 shows the EVM software interface. Figure 10. BUF08821EVM Software GUI BUF08821EVM Evaluation Board and Software Tutorial SBOU066 – September 2008 Submit Documentation Feedback...

  • Page 9: Power Supply Measurement And Recording

    V value entered. Changing this cell immediately changes the output of DAC8 to 0.996V. Figure 11. Power Supply Measurement and Recording Measure V at the location indicated in Figure SBOU066 – September 2008 BUF08821EVM Evaluation Board and Software Tutorial Submit Documentation Feedback...

  • Page 10: Reset And Read Dac Buttons

    The register configurations of the BUF08821 DACs are displayed in both analog voltage and in hexadecimal (see Figure 11). The DAC codes (that is, gamma voltages) can be saved into a text file using the Save to File button. BUF08821EVM Evaluation Board and Software Tutorial SBOU066 – September 2008 Submit Documentation Feedback...

  • Page 11: Save To File Dialog Box

    BUF08821 DAC code (gamma voltage) files. Enter a unique file name in the File name field to store your BUF08821 register information. Press the Open button to save the file. Figure 13. Save to File Dialog Box SBOU066 – September 2008 BUF08821EVM Evaluation Board and Software Tutorial Submit Documentation Feedback...

  • Page 12: Working With A Saved Buf08821 Data File

    The first entry in the file is the power-supply value. Fields 2 through 17 contain the DAC codes (decimal) for Outputs 1 through 16. Fields 20 and 21 contain the DAC codes (decimal) for V 1 and V BUF08821EVM Evaluation Board and Software Tutorial SBOU066 – September 2008 Submit Documentation Feedback...

  • Page 13: Load From File Button

    Using the BUF08821EVM Software www.ti.com Loading a Saved Data File The BUF08821EVM software is also able to load data saved from previous evaluations. A saved register configuration can be loaded into the BUF08821 using the Load From File button, shown in Figure 15.

  • Page 14: Changing The Dac Analog Voltage

    If you select a DAC and click on the up arrow control, the DAC register increases by one count. Conversely, clicking on the down arrow control decreases the DAC register by one count. BUF08821EVM Evaluation Board and Software Tutorial SBOU066 – September 2008...

  • Page 15: Run Batch Dialog Box

    Press the <Shift> key and click on the files you want to select. In Figure 17, two configuration files are selected. SBOU066 – September 2008 BUF08821EVM Evaluation Board and Software Tutorial Submit Documentation Feedback...

  • Page 16: Control Panel Button And Graphical Sliders

    Figure 18. Simply drag the slider to adjust the desired channel output. The DAC output value changes automatically. Figure 18. Control Panel Button and Graphical Sliders BUF08821EVM Evaluation Board and Software Tutorial SBOU066 – September 2008 Submit Documentation Feedback...

  • Page 17: Program Otp All Channels Button

    20, to program 0.996V into the nonvolatile memory of channel 8, use the up and down arrows to select channel 8. Then press the Write Selected Reg to OTP button. SBOU066 – September 2008 BUF08821EVM Evaluation Board and Software Tutorial Submit Documentation Feedback...

  • Page 18: Hardware And Schematic

    BUF08821EVM. Note: Board layouts are not to scale. These are intended to show how the board is laid out; they are not intended to be used for manufacturing BUF08821EVM PCBs. BUF08821EVM Evaluation Board and Software Tutorial SBOU066 – September 2008...

  • Page 19: Buf08821Evm Schematic

    Hardware and Schematic www.ti.com Schematic Figure 22 shows the schematic for the BUF08821EVM. Figure 22. BUF08821EVM Schematic SBOU066 – September 2008 BUF08821EVM Evaluation Board and Software Tutorial Submit Documentation Feedback...

  • Page 20: Buf08821Evm Pcb Top Layer (Component Side)

    Hardware and Schematic www.ti.com PCB Layouts Figure 23 Figure 24 show the PCB layout of the BUF08821EVM. Figure 23. BUF08821EVM PCB Top Layer (Component Side) BUF08821EVM Evaluation Board and Software Tutorial SBOU066 – September 2008 Submit Documentation Feedback...

  • Page 21: Buf08821Evm Pcb Bottom Layer (Solder Side)

    Hardware and Schematic www.ti.com Figure 24. BUF08821EVM PCB Bottom Layer (Solder Side) SBOU066 – September 2008 BUF08821EVM Evaluation Board and Software Tutorial Submit Documentation Feedback...
  • Page 22 SAM1029-50- ND) and "snap" to size Terminal Strip, 9 position, TSW-109-07-G-S Samtec Alt: Buy .100 centers, .025 square TSW-150-07-G-S pins (digikey SAM1029-50- ND) and "snap" to size BUF08821EVM Evaluation Board and Software Tutorial SBOU066 – September 2008 Submit Documentation Feedback...
  • Page 23 Screw, Machine, Phillips, PMSSS 440 0025 PH Building board 4-40X1/4 SS Fasteners see mechanical drawing/photo/sample Shunt, w/ handle, 2 pos, 881545-2 Tyco board 0.100in Electronics/A SBOU066 – September 2008 BUF08821EVM Evaluation Board and Software Tutorial Submit Documentation Feedback...
  • Page 24 EVALUATION BOARD/KIT IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards.
  • Page 25 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.
  • Page 26 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Texas Instruments BUF08821EVM...

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