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Texas Instruments BUF16821EVM-USB User Manual Download Page 26

Hardware and Schematic

www.ti.com

26

SBOU106A – May 2011 – Revised May 2016

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Copyright © 2011–2016, Texas Instruments Incorporated

BUF16821EVM-USB Evaluation Board and Software Tutorial

6.1

Schematic

Figure 24

shows the schematic for the BUF16821EVM-USB.

Figure 24. BUF16821EVM-USB Schematic

Summary of Contents for BUF16821EVM-USB

Page 1: ...atic PCB layout drawings and a parts list for the EVM Contents 1 Overview 2 2 BUF16821EVM USB Hardware Setup 4 3 BUF16821EVM USB Software 7 4 BUF16821EVM USB Software 14 5 BUF16821EVM USB Software Ove...

Page 2: ...ogrammable gamma voltage generator and VCOM calibrator with integrated two bank memory This device offers 16 programmable gamma channels and two programmable VCOM channels making it ideal for 10 bit s...

Page 3: ...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 BUF16821 product folder on the TI we...

Page 4: ...time of the writing of this document Newer revisions may be available from the TI web site or call the Texas Instruments Literature Response Center at 800 477 8924 or the Product Information Center a...

Page 5: ...uments Incorporated BUF16821EVM USB Evaluation Board and Software Tutorial 2 1 Theory of Operation for BUF16821 Hardware A block diagram of the BUF16821 test board hardware setup is shown in Figure 3...

Page 6: ...nection 4 N C No connection 5 N C No connection 6 N C No connection 7 N C No connection 8 N C No connection 9 I2C_SCK No connection 10 I2C_SDA2 No connection 11 N C No connection 12 I2C_SCK_ISO I2 C c...

Page 7: ...dules The details of its operation are included in a separate document SBOU058 available for download at www ti com The block diagram shown in Figure 4 gives a brief overview of the platform The prima...

Page 8: ...tion Board and Software Tutorial 3 2 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 b...

Page 9: ...cting Power After the two parts of the BUF16821EVM USB are conjoined connect the power to the USB_DIG_Platform board as Figure 6 shows Always connect power before connecting the USB cable If you conne...

Page 10: ...spond with a Found New Hardware USB Device pop up dialog The pop up window typically changes to Found New Hardware USB Human Interface Device This pop up indicates that the device is ready to be used...

Page 11: ...ard to match your specific configuration For example you may wish to set a specific I2 C address Figure 9 BUF16821EVM USB Default Jumper Settings Jumpers 1 through 4 on the BUF16821EVM USB are all typ...

Page 12: ...K_ISO control signal JMP4 This jumper selects whether the BKSEL pin on the BUF16821 is controlled by the manual switch located on the BUF16821EVM USB or whether the BKSEL can be controlled by an exter...

Page 13: ...nnected If JMP1 is set in the INT position the VSD pin is connected to the switchable VDUT signal generated from the USB DIG Platform This voltage can be set to either 3 3V or 5V depending on how JUMP...

Page 14: ...while mounted in this socket the BUF16821 cannot be operated at its full output capability as a result of thermal dissipation limitations CAUTION Only one location should be populated at a time The us...

Page 15: ...6821EVM USB Evaluation Board and Software Tutorial 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 t...

Page 16: ...program the default location is C Program Files BUF16821 and C Program Files National Instruments Following this option two license agreements are presented that must be accepted as shown in Figure 1...

Page 17: ...USB Software Overview This section discusses how to use the BUF16821EVM USB software 5 1 Starting the BUF16821EVM USB Software The BUF16821 software can be operated through the Windows Start menu From...

Page 18: ...s section see Section 3 7 jumper JMP5 is used to set the I2 C address pin of the BUF16821 Figure 15 shows how both the hardware and software must be set to allow for communication between the BUF16821...

Page 19: ...ion of the software interface as shown in Figure 17 Figure 17 Measuring and Entering Power Supply Voltage The voltages calculated for each channel are based on the value entered as VSUP as shown in Eq...

Page 20: ...Write feature is enabled no change occurs to the output voltages when the Write DAC button is pressed No change occurs because after the text box for a given channel has been updated as soon as anothe...

Page 21: ...al formats The DAC codes that is gamma voltages can be saved into a text file by using the Save to File button Pressing the Save to File button opens a file save dialog box similar to that shown in Fi...

Page 22: ...t Documentation Feedback Copyright 2011 2016 Texas Instruments Incorporated BUF16821EVM USB Evaluation Board and Software Tutorial Saved BUF16821 DAC codes gamma voltages exist in a text file that can...

Page 23: ...ick on the cell to be edited Click a second time and the cell turns from blue to black and allows the user to type the updated voltage in the cell The hexadecimal DAC codes can be entered in the Code...

Page 24: ...ent gamma settings to determine what the optimal settings must be for a given application When the Run Batch button is pressed a new dialog box displays as Figure 22 shows The delay time is the amount...

Page 25: ...UF16821EVM USB software window that changes based on the channel that highlighted as discussed in the above section Figure 23 Control Panel Button and Window 5 2 11 Program OTP All Channels Button Pre...

Page 26: ...evised May 2016 Submit Documentation Feedback Copyright 2011 2016 Texas Instruments Incorporated BUF16821EVM USB Evaluation Board and Software Tutorial 6 1 Schematic Figure 24 shows the schematic for...

Page 27: ...2016 Submit Documentation Feedback Copyright 2011 2016 Texas Instruments Incorporated BUF16821EVM USB Evaluation Board and Software Tutorial 6 2 PCB Layouts Figure 25 shows the PCB layout of the BUF1...

Page 28: ...J1 Connector D SUB Plug R A 25 Pos 30Gold with threaded inserts and board locks AMP Tyco Electronics 5747842 4 9 1 SW1 Switch Toggle SPDT 4VA PC Mount E Switch 200AWMSP1T1A1M2RE 10 3 T1 T3 Terminal bl...

Page 29: ...ing the warranty period to the address designated by TI and that are determined by TI not to conform to such warranty If TI elects to repair or replace such EVM TI shall have a reasonable time to repa...

Page 30: ...transmitter has been approved by Industry Canada to operate with the antenna types listed in the user guide with the maximum permissible gain and required antenna impedance for each antenna type indic...

Page 31: ...ified allowable ranges some circuit components may have elevated case temperatures These components include but are not limited to linear regulators switching transistors pass transistors current sens...

Page 32: ...REMOVAL OR REINSTALLATION ANCILLARY COSTS TO THE PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES RETESTING OUTSIDE COMPUTER TIME LABOR COSTS LOSS OF GOODWILL LOSS OF PROFITS LOSS OF SAVINGS LOSS OF USE L...

Page 33: ...sponsible for compliance with all legal regulatory and safety related requirements concerning its products and any use of TI components in its applications notwithstanding any applications related inf...

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