Texas Instruments LM36923HEVM Скачать руководство пользователя страница 16 | Manualshive

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Texas Instruments LM36923HEVM Скачать руководство пользователя страница 16

USB Interface Board and I

2

C-Compatible Interface Program

16

SNVU509 – January 2016

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Copyright © 2016, Texas Instruments Incorporated

LM36923HEVM User's Guide

5.4

PWM Pin Control

The LM36923HEVM provides the user with the capability to control the PWM input without the need of an
external source. The PWM signal will be low until the "PWM Enable" button is clicked or whenever the
"Duty Cycle" value is set to 0. In order to change the PWM duty cycle the user can either type the desired
duty cycle in the "Duty Cycle" box or click on the up/down buttons associated with the numeric updown
box. The PWM frequency can be changed by selecting the desired setting via the Frequency drop-down
box.

Figure 15. PWM Input Pin Control

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Содержание LM36923HEVM

Страница 1: ...Using the LM36923HEVM Evaluation Module User s Guide Literature Number SNVU509 January 2016 ...

Страница 2: ...cription 6 2 2 Setup 7 2 3 Operation 7 3 Board Layout 8 4 Schematic 11 5 USB Interface Board and I2 C Compatible Interface Program 13 5 1 User Interface 13 5 2 LM36923H Software Reset 14 5 3 LM36923H Fault Flags 15 5 4 PWM Pin Control 16 5 5 ASEL Pin Control 17 5 6 History Macro Tab 18 5 7 Individual register read write access 19 5 8 Macro Example 20 5 9 Updating USB2ANY Firmware 23 ...

Страница 3: ... Middle Layer 2 Routing 10 10 Bottom Assembly Layer MIRRORED 10 11 LM36923EVM Schematic 11 12 LM36923H General User Interface 13 13 LM36923H Software Reset 14 14 Fault Flags 15 15 PWM Input Pin Control 16 16 ASEL Input Pin Control 17 17 GUI History following Read All button clicked 18 18 Register read write access 19 19 Example macro 20 20 Example macro loaded tool tip enabled 21 21 Example macro ...

Страница 4: ...m 4 SNVU509 January 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated List of Tables List of Tables 1 Device and Package Configurations 5 2 Bill of Materials 12 3 Macro commands 20 ...

Страница 5: ...D and a single LED per string which can be easily configured to support 1 2 or 3 parallel LED strings with 3 4 5 6 7 8 9 10 11 12 or 13 series LEDs Notes 1 Not all combinations of VIN LED strings and Number of Series LEDs are supported by the LM36923H Refer to the data sheet to ensure the proper configuration 2 The dual LED are very bright they are not diffused and are capable of 21 lumens per pac...

Страница 6: ...is the jumper used to enable the LED driver HWEN pin The driver will be enabled when the HWEN pin is high VIO and disabled when it is low GND VL VIN The user can measure the Backlight Driver Input Current by omitting this jumper and inserting a current meter between pins 1 VIN and 2 VL ASEL This connector provides a method for controlling the ASEL input to configure the I2 C slave address A jumper...

Страница 7: ...bypassed in the respective LED string ILED1 ILED2 ILED3 The LM36923HEVM provides a way to accurately measure the LED current through each LED string on board Resistors RL1 RL2 and RL3 10 Ω are placed between the cathode of last LED in each respective string and the LM36923H Current Sink Output 2 2 Setup The input voltage range for the backlight driver is 2 5 volts to 5 5 volts The on board LEDs or...

Страница 8: ... the board layout for the LM36923HEVM The EVM offers resistors capacitors and jumpers to enable the device and to configure it as desired The LM36923H will dissipate power especially during high brightness maintained for a long duration Power will also be dissipated on the series LEDs in each LED strings The EVM layout is designed to minimize temperature rise during operation however prolonged usa...

Страница 9: ... ti com Board Layout 9 SNVU509 January 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated LM36923HEVM User s Guide Figure 7 Top Assembly Layer Figure 8 Middle Layer 1 Routing ...

Страница 10: ...ut www ti com 10 SNVU509 January 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated LM36923HEVM User s Guide Figure 9 Middle Layer 2 Routing Figure 10 Bottom Assembly Layer MIRRORED ...

Страница 11: ...www ti com Schematic 11 SNVU509 January 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated LM36923HEVM User s Guide 4 Schematic Figure 11 LM36923EVM Schematic ...

Страница 12: ...Rohm SML312WBCW1 3 GND Standard Banana Jack Insulated Black Keystone 6092 1 GND2 HWEN ILED1 ILED2 ILED3 J1A J1C J2A J2C J3A J3C ODD1 ODD2 ODD3 PWM VL2 VL VIN Header TH 100mil 2x1 Gold plated 230 mil above insulator Samtec TSW 102 07 G S 17 H1 H2 H3 H4 Bumpon Cylindrical 0 312 X 0 200 Black 3M SJ61A1 4 J1B J2B J3B Header TH 100mil 4x1 Gold plated 230 mil above insulator Samtec TSW 104 07 G S 3 L1 I...

Страница 13: ...st be connected to the board from a PC The I2 C compatible interface program provides all of the control that the LM36923H part requires For proper operation the USB docking board should be plugged into the PC before the interface program is opened Once connected and the program is executed a basic interface window will open Figure 12 shows the default settings which are updated after the user cli...

Страница 14: ...it Documentation Feedback Copyright 2016 Texas Instruments Incorporated LM36923HEVM User s Guide 5 2 LM36923H Software Reset Selecting the Reset button sends the I2 C Software Reset command which sets all registers to their default values and updates all GUI fields Figure 13 LM36923H Software Reset ...

Страница 15: ...nuary 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated LM36923HEVM User s Guide 5 3 LM36923H Fault Flags The contents of the LM36923H fault registers are read upon clicking the Read button The registers are cleared upon read back Figure 14 Fault Flags ...

Страница 16: ...rol the PWM input without the need of an external source The PWM signal will be low until the PWM Enable button is clicked or whenever the Duty Cycle value is set to 0 In order to change the PWM duty cycle the user can either type the desired duty cycle in the Duty Cycle box or click on the up down buttons associated with the numeric updown box The PWM frequency can be changed by selecting the des...

Страница 17: ...t to the LM36923HEVM is set via the GUI in the I2 C options dialog When unchecked ASEL will be low and the I2 C slave address used by the GUI is set to 0x36 When checked ASEL will be high and the I2 C slave address used by the GUI is set to 0x37 If the LM36923HEVM ASEL jumper is set to a fixed setting the user will need to verify that the GUI Address Select setting matches the jumper on the EVM Fi...

Страница 18: ...tory Macro Tab The LM36923HEVM GUI provides history register access and macro capability when the History checkbox is checked The history information can be cleared by clicking the Clear button or saved to file by clicking the Save to file button Clicking the Save to file button will open up a dialog box to select the file location and file name Figure 17 GUI History following Read All button clic...

Страница 19: ...rporated LM36923HEVM User s Guide 5 7 Individual register read write access When the History Macros tab is enabled the user can read or write to individual registers in the LM36923H Any read or write access is reflected in the history section in addition to the register box located to the right of the Read and Write buttons Figure 18 Register read write access ...

Страница 20: ...gister hex address and variable for return data Optional keyword allows user to read any register value appears in history section WR write register two fields required register hex address and register hex data Optional keyword allows user to write any register value written appears in history section MDLY millisecond delay one field decimal delay Optional keyword allows user to insert a millisec...

Страница 21: ...ote that two new buttons named rd2 and Example appear on the GUI The user can clear all macro buttons by clicking the Clear All button The user can also add additional macros by clicking the New button which will open a macro editor The editor will verify that the correct syntax is used and will prompt the user if any error is discovered Clicking the Save All button will save all defined macros in...

Страница 22: ...Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated LM36923HEVM User s Guide The message box opens when the OK keyword is executed in the Example macro Macro execution is halted until the message box is closed by clicking the OK button Figure 21 Example macro message box ...

Страница 23: ...he correct version If the USB2ANY firmware version does not match the user will be prompted to update the USB2ANY firmware Figure 22 USB2ANY firmware unknown update If power is applied to the LM36923HEVM it must be turned off before proceeding with the USB2ANY Firmware Loader instructions as noted in Figure 23 Figure 23 USB2ANY firmware update step 1 When the USB2ANY is ready for firmware update t...

Страница 24: ...k Copyright 2016 Texas Instruments Incorporated LM36923HEVM User s Guide Figure 24 USB2ANY firmware update step 2 After the USB2ANY firmware is successfully updated the user must click the Close button to close the USB2ANY Firmware Loader and return control to the LM36923HEVM GUI Figure 25 USB2ANY firmware update complete ...

Страница 25: ...ring 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 repair such EVM or provide replacements Repaired EVMs shall be warranted for the remainder of the original warranty period Replaced EVMs shall be warranted for a new full ninety 90 day warranty period 3 ...

Страница 26: ... 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 indicated Antenna types not included in this list having a gain greater than the maximum gain indicated for that type are strictly prohibited for use with this device Concernant les EVMs avec antennes détachables Conformément à la rég...

Страница 27: ... 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 even with the inputs and outputs kept within the specified allowable ranges some circuit components may have elevated case temperatures These components include but are not limited to linear regulators switching transistors pass transistors cu...

Страница 28: ...F 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 LOSS OF DATA OR BUSINESS INTERRUPTION NO CLAIM SUIT OR ACTION SHALL BE BROUGHT AGAINST TI MORE THAN ONE YEAR AFTER THE RELATED CAUSE OF ACTION HAS OCCURRED 8 2 Specific Limitations IN NO EVENT SHALL T...

Страница 29: ...esponsible 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 information or support that may be provided by TI Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which anticipate dangerous consequences of failur...

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