Texas Instruments BUF16821EVM-USB User Manual
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Texas Instruments BUF16821EVM-USB User Manual

Texas Instruments BUF16821EVM-USB User Manual

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BUF16821EVM-USB Evaluation Board and Software
This user's guide describes the characteristics, operation, and use of the BUF16821EVM-USB 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 BUF16821EVM-USB. 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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PowerPAD is a trademark of Texas Instruments.
Microsoft, Windows are registered trademarks of Microsoft Corporation.
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All other trademarks are the property of their respective owners.
SBOU106A - May 2011 - Revised May 2016
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BUF16821EVM-USB Evaluation Board and Software Tutorial
Copyright © 2011-2016, Texas Instruments Incorporated
SBOU106A - May 2011 - Revised May 2016
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Summary of Contents for Texas Instruments BUF16821EVM-USB

  • Page 1: Table Of Contents

    BUF16821EVM-USB Evaluation Board and Software Tutorial This user's guide describes the characteristics, operation, and use of the BUF16821EVM-USB 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 BUF16821EVM-USB.

  • Page 2: Overview

    This device offers 16 programmable gamma channels and two programmable V channels, making it ideal for 10-bit source TFT-LCD reference drivers. The BUF16821EVM-USB is a platform for evaluating the performance of the BUF16821 under various signal, reference, and supply conditions.

  • Page 3: Hardware Included With Buf16821Evm-Usb Kit

    Overview www.ti.com BUF16821EVM-USB Kit Contents Table 1 summarizes the contents of the BUF16821EVM-USB kit. Figure 1 shows all of the included hardware. Contact the Texas Instruments Product Information Center nearest you if any component is missing. It is highly recommended that you also check the...

  • Page 4: Buf16821Evm-Usb Hardware Setup

    The following documents provide information regarding Texas Instruments' integrated circuits used in the assembly of the BUF16821EVM-USB. This user's guide is available from the TI web site under literature number SBOU106. Any letter appended to the literature number corresponds to the document revision that is current at the time of the writing of this document.

  • Page 5: Buf16821Evm-Usb Board Block Diagram

    Test Point BUF16821 TPG1 DSUB Header I C A0 Address Jumper Figure 3. BUF16821EVM-USB Board Block Diagram SBOU106A – May 2011 – Revised May 2016 BUF16821EVM-USB Evaluation Board and Software Tutorial Submit Documentation Feedback Copyright © 2011–2016, Texas Instruments Incorporated...
  • Page 6 BUF16821EVM-USB Hardware Setup www.ti.com Signal Definitions of J1 (25-Pin Male DSUB) Table 3 lists the various signals connected to J1 on the BUF16821EVM-USB test board. Table 3. Signal Definition of J1 (25-Pin Male DSUB) on BUF16821EVM-USB Board Pin on J1...

  • Page 7: Buf16821Evm-Usb Software

    Theory of Operation for USB_DIG_Platform Figure 4 shows the block diagram for the USB_DIG_Platform. This platform is a general-purpose data acquisition system that is used on several different Texas Instruments evaluation modules. The details of its operation are included in a separate document, SBOU058 (available for download at www.ti.com).

  • Page 8: Typical Hardware Connections For Buf16821Evm-Usb

    Typical Hardware Connections To set up the BUF16821EVM-USB hardware, connect the two PCBs of the EVM together (that is, the BUF16821 Test Board and USB_DIG_Platform board) via a 25-pin DSUB connector, and apply a power source. The external connections may be the real-world system that the BUF16821 will be incorporated into.

  • Page 9: Connecting External Power To The Evm

    BUF16821EVM-USB Software www.ti.com Connecting the Hardware To connect the two PCBs of the BUF16821EVM-USB together, gently push on both sides of the DSUB connectors (as shown in Figure 6). Note that the USB_DIG_Platform board has two DSUB connectors; either may be used. Make sure that the two connectors are completely pushed together; loose connections may cause intermittent operation.

  • Page 10: Connecting The Usb Cable To The Usb_Dig_Platform

    Once power is connected, the USB cable must be connected to the USB_DIG_Platform, as shown in Figure 7. Note that the BUF16821EVM-USB test board and the USB_DIG_Platform board must each be powered on before connecting the USB cable. Typically, the computer will respond with a Found New Hardware, USB Device pop-up dialog.

  • Page 11: Buf16821Evm-Usb Default Jumper Settings

    Figure 9. BUF16821EVM-USB Default Jumper Settings Jumpers 1 through 4 on the BUF16821EVM-USB are all typically set to the same position. When set to the INT position, the signals from the digital supply, bank select, and the digital communication lines are generated and controlled from the USB_DIG_Platform or by the onboard bank select switch.
  • Page 12 BUF16821EVM-USB Software www.ti.com Table 4 summarizes the function of the BUF16821EVM-USB test board jumpers. For most applications, Jumpers 1 through 5 are all set to the default positions. Table 4. BUF16821EVM-USB Test Board Jumper Functions Jumper Default Purpose This jumper selects whether the V...
  • Page 13 Bank 1 selects the gamma curve that is stored in Bank_1 of the BUF16821. This switch also determines the OTP bank that is written to by the BUF16821EVM-USB software. Note that this switch is not effective if JMP4 is set to EXT.

  • Page 14: Buf16821Evm-Usb Software

    ® operating systems (OS) with United States and European regional settings. Software Installation The BUF16821EVM-USB software is included on the CD that is shipped with the EVM kit. It is also available through the BUF16821EVM-USB product folder on the TI website. To install the software to a computer, insert the disc into an available CD-ROM drive.

  • Page 15: Buf16821Evm-Usb Software Installation

    BUF16821EVM-USB Software www.ti.com Once the files are extracted, navigate to the BUF16821EVM-USB folder you created on the hard drive. Locate the setup.exe file and execute it to start the installation. The BUF16821 software installer file then begins the installation process as shown in Figure Figure 10.

  • Page 16: Buf16821Evm-Usb License Agreements

    Instruments\. Following this option, two license agreements are presented that must be accepted, as shown in Figure 11. After accepting the Texas Instruments and National Instruments license agreements, the progress bar opens and shows the installation of the software, as Figure 12 illustrates.

  • Page 17: Buf16821Evm-Usb Software Overview

    Software Description and Set-Up The BUF16821EVM-USB software allows the user to read and write to all registers in the BUF16821 gamma correction buffer. Furthermore, it allows programming of the OTP register on the BUF16821. The software also permits the user to select either I C address.

  • Page 18: Jmp5 Setting For Logic '1

    Figure 15 shows how both the hardware and software must be set to allow for communication between the BUF16821EVM-USB and the software. Without jumper JMP5 and the software address button configured correctly, the software will not be able to communicate with the BUF16821 device.

  • Page 19: Measuring And Entering Power-Supply Voltage

    5.2.3 Read DAC Button By pressing the Read DAC button in the BUF16821EVM-USB software, all of the BUF16821 DAC/V registers are read to obtain the respective current register contents. Once the read procedure is complete, all of the corresponding text boxes are updated to show the current values present in the DAC/V registers.

  • Page 20: Auto Write Feature Enabled

    The first method allows for the output voltage to change immediately after the writing to the DAC register. In the BUF16821EVM-USB software, this mode is configured by enabling the Auto Write feature found in the Buffer dropdown menu. In this mode, as an individual channel is written to, the output voltage changes as soon as the user moves to a different text box in the software.

  • Page 21: Save To File Dialog Box Button And Window

    BUF16821 register information. Press the OK button to save the file. Figure 19. Save to File Dialog Box Button and Window SBOU106A – May 2011 – Revised May 2016 BUF16821EVM-USB Evaluation Board and Software Tutorial Submit Documentation Feedback Copyright © 2011–2016, Texas Instruments Incorporated...

  • Page 22: File Format Of Saved Data

    Saved BUF16821 DAC codes (gamma voltages) exist in a text file that can be opened in a text editor, as Figure 20 illustrates. Figure 20. File Format of Saved Data BUF16821EVM-USB Evaluation Board and Software Tutorial SBOU106A – May 2011 – Revised May 2016 Submit Documentation Feedback Copyright © 2011–2016, Texas Instruments Incorporated...

  • Page 23: Load From File Button And Window

    5.2.7 Load From File Button The BUF16821EVM-USB software is also able to load data saved from previous evaluations. A saved register configuration can be loaded into the BUF16821 using the Load From File button, as shown in Figure 21. The program remembers where you saved the last register configuration. Simply select the desired configuration and press Open.

  • Page 24: Run Batch Dialog Button And Window

    Once a series of filenames have been selected, the check box turns dark. Double-click on a filename again to unselect it from the batch run. Figure 22. Run Batch Dialog Button and Window BUF16821EVM-USB Evaluation Board and Software Tutorial SBOU106A – May 2011 – Revised May 2016 Submit Documentation Feedback...

  • Page 25: Hardware And Schematic

    23. Simply drag the slider to adjust the desired channel output. The DAC code and corresponding output value of each channel change automatically. This function is similar to the slider present on the primary BUF16821EVM-USB software window that changes based on the channel that highlighted (as discussed in the above section).
  • Page 26 Hardware and Schematic www.ti.com Schematic Figure 24 shows the schematic for the BUF16821EVM-USB. Figure 24. BUF16821EVM-USB Schematic BUF16821EVM-USB Evaluation Board and Software Tutorial SBOU106A – May 2011 – Revised May 2016 Submit Documentation Feedback Copyright © 2011–2016, Texas Instruments Incorporated...
  • Page 27 PCB Layouts Figure 25 shows the PCB layout of the BUF16821EVM-USB. Figure 25. BUF16821EVM-USB PCB Top Layer (Component Side) SBOU106A – May 2011 – Revised May 2016 BUF16821EVM-USB Evaluation Board and Software Tutorial Submit Documentation Feedback Copyright © 2011–2016, Texas Instruments Incorporated...
  • Page 28 NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Original (May 2011) to A Revision ......................Page ..............• Added new part to the BUF16821EVM-USB Kit Contents table....................• Changed 'Hardware Included' image...... •...
  • Page 29 STANDARD TERMS AND CONDITIONS FOR EVALUATION MODULES Delivery: TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, or documentation (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance with the terms and conditions set forth herein. Acceptance of the EVM is expressly subject to the following terms and conditions.
  • Page 30 FCC Interference Statement for Class B EVM devices NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
  • Page 31 【無線電波を送信する製品の開発キットをお使いになる際の注意事項】 開発キットの中には技術基準適合証明を受けて いないものがあります。 技術適合証明を受けていないもののご使用に際しては、電波法遵守のため、以下のいずれかの 措置を取っていただく必要がありますのでご注意ください。 1. 電波法施行規則第6条第1項第1号に基づく平成18年3月28日総務省告示第173号で定められた電波暗室等の試験設備でご使用 いただく。 2. 実験局の免許を取得後ご使用いただく。 3. 技術基準適合証明を取得後ご使用いただく。 なお、本製品は、上記の「ご使用にあたっての注意」を譲渡先、移転先に通知しない限り、譲渡、移転できないものとします。 上記を遵守頂けない場合は、電波法の罰則が適用される可能性があることをご留意ください。 日本テキサス・イ ンスツルメンツ株式会社 東京都新宿区西新宿６丁目２４番１号 西新宿三井ビル 3.3.3 Notice for EVMs for Power Line Communication: Please see http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page 電力線搬送波通信についての開発キットをお使いになる際の注意事項については、次のところをご覧くださ い。http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page SPACER EVM Use Restrictions and Warnings: 4.1 EVMS ARE NOT FOR USE IN FUNCTIONAL SAFETY AND/OR SAFETY CRITICAL EVALUATIONS, INCLUDING BUT NOT LIMITED TO EVALUATIONS OF LIFE SUPPORT APPLICATIONS.
  • Page 32 Notwithstanding the foregoing, any judgment may be enforced in any United States or foreign court, and TI may seek injunctive relief in any United States or foreign court. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2015, Texas Instruments Incorporated...
  • Page 33 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue.

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