Texas Instruments LP8580EVM User Manual Download Page 2

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SNVU495 – March 2016

Table of Contents

Contents

Preface

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Introduction

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Description of the LP8580 Device

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2.1

Features

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2.2

Applications

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Hardware Setup

...................................................................................................................

3.1

LED Connectors

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3.2

VCC and VDD Jumpers

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3.3

Buttons

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3.4

Indicator LED

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3.5

Interface Setup

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LP8580EVM Evaluation Software

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4.1

LP8580EVM Evaluation Software Installation

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4.2

Driver Installation

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4.3

Evaluation Software Removal

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Using the LP8580EVM Evaluation Software

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5.1

Digital Input Control

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5.2

Interface Selection

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5.3

...........................................................................................................

5.4

..................................................................................................

5.5

Direct Register Control

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5.6

EEPROM Control Area

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5.7

Direct EEPROM Access

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5.8

Status Bar

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5.9

History Tab

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5.10

Menu Bar

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Examples

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6.1

Starting up the LP8580EVM

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6.2

Turn Backlight ON and Control the Brightness

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6.3

Using PWM Brightness Control

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6.4

Turning ON the VCOMTRIM Output

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6.5

Saving the EEPROM Content to a Text File

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6.6

EEPROM Reprogramming

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6.7

Saving Register Settings to a File

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6.8

Reading Control Register Values from a Text File

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6.9

Using Macros

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Evaluation Board Schematic

................................................................................................

7.1

Bill of Materials for LP8580EVM

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LP8580EVM PCB Layout and Layers

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Summary of Contents for LP8580EVM

Page 1: ...egistered trademark of Microsoft SPI is a trademark of Motorola All other trademarks are the property of their respective owners Using the LP8580EVM Evaluation Module User s Guide Literature Number SNVU495 March 2016 ...

Page 2: ...ware 8 5 1 Digital Input Control 9 5 2 Interface Selection 9 5 3 Register View 10 5 4 Register Control Area 10 5 5 Direct Register Control 10 5 6 EEPROM Control Area 10 5 7 Direct EEPROM Access 11 5 8 Status Bar 11 5 9 History Tab 11 5 10 Menu Bar 13 6 Examples 17 6 1 Starting up the LP8580EVM 17 6 2 Turn Backlight ON and Control the Brightness 17 6 3 Using PWM Brightness Control 17 6 4 Turning ON...

Page 3: ...ntation from Texas Instruments LP8580 data sheet SNVSA65 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 int...

Page 4: ...thin 2 9 V to 5 V This voltage range is within the absolute maximum input range of the LP8580 Users are cautioned to evaluate their specific operating conditions and choose components with the appropriate voltage ratings before designing this support circuitry into a final product Table 1 PART NUMBER PACKAGE BODY SIZE NOM LP8580 QFN 24 4 00 mm 4 00 mm 2 Description of the LP8580 Device The LP8580 ...

Page 5: ...LK SCL 1V8 TCON EN SPI eDP EN Panel LP8580 battery 3 3V CLDO HSYNC IFSEL DAC AVDD VCOM VDDIO CVDDIO 1 8 3 3V NAVDD VCOMTRIM INT www ti com Description of the LP8580 Device 5 SNVU495 March 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated LP8580 Evaluation Board Figure 1 Typical Application ...

Page 6: ...s see Section 7 for connection details LED anodes must be connected to BOOST pin and the cathodes to LEDx pins The GND pin is provided for measurement purposes only and does not need to be connected to the LEDs If LEDs are connected to connector J111 connector J122 can be used to measure the individual LED currents and boost converter output current LEDx and LEDx OUT pins connect to the different ...

Page 7: ...ush buttons on the EVM Button S200 FW LOAD is used for microcontroller firmware programming during LP8580EVM manufacturing and does require input from the user Button S201 RESET can be used to reset the onboard microcontroller if firmware gets stuck for any reason 3 4 Indicator LED When LP8580EVM is connected to the USB port LED D201 should be blinking indicating that the firmware of the onboard m...

Page 8: ...mended Click Install Once installation is complete close the installer by clicking Close button 4 2 Driver Installation When the LP8580EVM is connected to a computer for the first time Windows should recognize it automatically and start to install the driver A Found New Hardware dialog box prompts user to locate the missing driver Select No not this time and continue with Next Select Install from ...

Page 9: ...t and the VSYNC generator can be turned on and off The Update button needs to be pressed to update new frequency or duty cycle to the VSYNC generator HSYNC control can be used to control the HSYNC pin The HSYNC frequency can be set and HSYNC generator can be turned on and off Update button needs to be pressed to update new frequency to the VSYNC generator 5 2 Interface Selection The LP8580 support...

Page 10: ... registers into register view click Operation Read All Registers 5 4 Register Control Area When any of the registers is selected it appears in the register control area All registers of the LP8580 are 16 bits long but the unused bits are hidden in the register control Changing the register bit settings does not automatically update the register value Once all the register bits are set the WR butto...

Page 11: ...read the content of the LP8580 EEPROM into the EEPROM content window The Load button can be used to load EEPROM values form a text file into EEPROM content window EEPROM content of the LP8580 IC is not updated until the Write button is pressed Figure 9 EEPROM Control Area 5 7 Direct EEPROM Access Direct EEPROM access can be used to read and write a single EEPROM register To read a register value s...

Page 12: ...istory Tab The Commands view of the history tab shows the commands that the evaluation software sends to the virtual COM port This can be useful if one wants to automate some tests with automated test sequencers The same command can be sent from any program that interfaces with the virtual COM port The Commands view also shows commands that are used to control the digital input pins ...

Page 13: ...xas Instruments Incorporated LP8580 Evaluation Board Figure 11 Commands View 5 10 Menu Bar The LP8580 evaluation software has three items in its menu bar File Operations and About 5 10 1 File Menu The file menu has 6 menu items Save Register Block Load Register Block Save All Registers Load All Registers Options and Exit ...

Page 14: ... values are read in the same order they are written in the text file The Save All Registers option saves the all registers to a text file Selecting Save All Registers opens a Save As window which allows user to give the text file a descriptive name Load All Registers loads new values from a text file into all registers Selecting Load All Registers opens Open Dialog which allows the user to select ...

Page 15: ...Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated LP8580 Evaluation Board Figure 13 Interface Options The General options tab sets general settings for the evaluation software these settings are set correctly by default and do not require adjusting ...

Page 16: ... Operations menu has four items SPI Slave Select Read Register Block Read All Registers and Execute Macro SPI Slave Select selects the output pin for the SPI slave select signal SS1 is selected by default and this should not be changed When evaluation software is started all the register in the register view are zeros Read Register Block reads the content of the register block that is selected in ...

Page 17: ... the Brightness This example assumes that AUTOSTART bit is set to 0 1 Start up the device as described in Section 6 1 2 Set the desired LED output current into the LEDx_CURRENT registers These registers can be found under the Backlight_settings memory block 3 Set the desired PWM value for each LED output into the LEDx_B0 registers These registers can be found under the Backlight_settings register ...

Page 18: ... 0x0001 to the VCOM_DB_CONTROL register under the VCOM_DYNAMIC_TRIM register block 6 5 Saving the EEPROM Content to a Text File EEPROM content can be saved to a text file for future use 1 Read EEPROM values into the EEPROM content window by clicking the Read button under the EEPROM content window It is not necessary to unlock EEPROM to read the values 2 Click the Save button give the text a file n...

Page 19: ...TE The register file must have same number of lines containing register settings as the register block that is being set up The settings are read line by line and the register address in the file is ignored 6 9 Using Macros Macros have a structure similar to the register settings files but they have one advantage In register files data must be in same order as the registers and they are read into ...

Page 20: ...RPROM programming This macro does not turn on the backlight PWM_BrightnessControl txt macro file configures uniform values for LED currents and regional brightness It turns on the backlight with PWM brightness control Overall brightness can be controlled with the dimming control of the evaluation software This macro requires that the LP8580EVM and software are set for I2C interface RegisterBrightn...

Page 21: ...m Evaluation Board Schematic 21 SNVU495 March 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated LP8580 Evaluation Board 7 Evaluation Board Schematic Figure 17 LP8580 Main Schematic ...

Page 22: ...Evaluation Board Schematic www ti com 22 SNVU495 March 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated LP8580 Evaluation Board Figure 18 Microcontroller Schematic ...

Page 23: ...C224K4RACTU C215 C216 2 22 pF C0603C220J5GACTU D100 1 60 V RB160M 60TR D200 1 Green LTST C190GKT D201 1 Orange LTST C190KFKT L100 1 4 7 uH VLF504015MT 4R7M R100 1 1 kΩ CRCW06031K00FKEA R101 1 14 kΩ CRCW060314K0FKEA R102 1 17 8 kΩ CRCW060317K8FKEA R103 1 1 Ω CRCW06031R00FKEA R104 R105 R106 R107 R108 R109 6 10 Ω RT0603BRD0710RL R200 1 100 Ω CRCW0603100RJNEA R201 1 47 kΩ RC0603JR 0747KL R202 R205 2 2...

Page 24: ... Layers www ti com 24 SNVU495 March 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated LP8580 Evaluation Board 8 LP8580EVM PCB Layout and Layers Figure 19 Top Layer Figure 20 Mid Layer 1 GND Plane ...

Page 25: ...ti com LP8580EVM PCB Layout and Layers 25 SNVU495 March 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated LP8580 Evaluation Board Figure 21 Mid Layer 2 Figure 22 Bottom Layer ...

Page 26: ...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 ...

Page 27: ... 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...

Page 28: ... 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...

Page 29: ...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...

Page 30: ...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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