Using the LM36274 Evaluation Module
User's Guide
Literature Number: SNVU512
February 2016
Contents
1
2
3
4
5
6
2
Introduction ......................................................................................................................... 4
Setup .................................................................................................................................. 5
2.1
Input/Output Connector Description ................................................................................... 5
2.2
Setup ....................................................................................................................... 6
Schematic ........................................................................................................................... 8
Bill of Materials (BOM) .......................................................................................................... 9
Board Layout ..................................................................................................................... 12
USB Interface Board and I2C-Compatible Interface Program .................................................... 13
6.1
Establishing I2C Communication ...................................................................................... 14
6.2
GUI Controls
6.3
Saving and Loading Register Settings ............................................................................... 17
6.4
I2C Communication Block ............................................................................................. 17
6.5
SWR RESET Button
6.6
Backlight Operation..................................................................................................... 18
6.7
VPOS/VNEG Operation ................................................................................................ 18
6.8
Flags Register ........................................................................................................... 18
6.9
General Register Read/Write
6.10
GPIO Controls........................................................................................................... 19
............................................................................................................
...................................................................................................
.........................................................................................
Table of Contents
14
18
19
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List of Figures
........................................................................................................
1
LM36274EVM Photo
2
Backlight LED Configuration Example .................................................................................... 5
3
LM36274EVM Recommended Jumper Placement ...................................................................... 7
4
Top Assembly Layer ....................................................................................................... 12
5
Bottom Assembly Layer ................................................................................................... 12
6
Top Layer Routing
7
Middle Layer 1 Routing .................................................................................................... 12
8
Middle Layer 2 Routing .................................................................................................... 12
9
Bottom Routing ............................................................................................................. 12
10
LM36274 General User Interface ........................................................................................ 13
11
LM36274 Register Control View.......................................................................................... 15
12
LM36274 Backlight Control View ......................................................................................... 16
13
LM36274 LCD Bias Control View ........................................................................................ 17
14
I2C Communication Fields ................................................................................................. 18
15
Backlight Enable Register Fields ......................................................................................... 18
16
LCM Display Bias Configuration1 Register Fields ..................................................................... 18
17
Flags Read Register ....................................................................................................... 19
18
General Register Fields ................................................................................................... 19
19
Backlight PWM Controls................................................................................................... 19
20
LCD Bias GPIO Controls .................................................................................................. 19
.........................................................................................................
4
12
List of Tables
1
Device and Package Configurations ...................................................................................... 4
2
LM36274EVM BOM ......................................................................................................... 9
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User's Guide
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LM36274EVM User's Guide
1
Introduction
The Texas Instruments LM36274EVM evaluation module (EVM) helps designers evaluate the operation
and performance of the LM36274 Backlight + Bias Power. The device offers configurability via I2Ccompatible interface. Both blocks can be enabled via the I2C interface. In addition, the LCM Bias functions
can be enabled externally using the LCM_EN pins. The module utilizes up to 4 strings of 8 backlight LEDs
connected in series mounted on the EVM.
The EVM contains one LM36274 device (see Table 1).
Table 1. Device and Package Configurations
BACKLIGHT + LCD BIAS DRIVER
IC
PACKAGE
U1
LM36274
0.4 mm-pitch, 24-pin DSBGA
Figure 1. LM36274EVM Photo
4
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Setup
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2
Setup
This section describes the jumpers and connectors on the EVM as well as how to properly connect, set
up, and use the LM36274EVM.
2.1
2.1.1
Input/Output Connector Description
Input / GND
There are two input terminals and one ground for the EVM, providing a power (VIN) and ground (GND)
connection to allow the user to attach the EVM to a cable harness. The two input terminals allow the user
to split the input to the two boost drivers so that the input power to each block can be measured
independently. Both input terminals can be shorted together by jumpers J3 and J4 or by 0-Ω resistors R4
and R6. The default configuration has R4 and R6 assembled, so if the user desires to split the input power
they need to be removed from the board.
2.1.2
HWEN (J7)
This is the jumper used to enable the device. The driver will be enabled when the HWEN pin is high (VIO)
and disabled when it is floating. There is a 300-kΩ pulldown resistor to GND on this pin.
2.1.3
VIO (J12)
This pin provides power for the I2C lines (clock and data), for the HWEN pin and for the LCM bias enable
pins (LCM_EN1 and LCM_EN2). TI recommends that this pin is connected to the VIN pin. If desired, it can
be connected to the 3.3-V line provided by the USB interface connector. In this configuration,
communication via the I2C interface may not be possible if the supply voltage to the LED driver is below
approximately 3 V.
2.1.4
LCM1EN (J9) and LCM2EN (J10)
These jumpers can be used to externally enable the VPOS and VNEG outputs of the LCM Bias block. The
outputs are enabled when the pins are high (VIO) and disabled when left floating. There are 300-kΩ
pulldown resistors to GND on both of these pins. The LCM_EN1 and LCM_EN2 pins can also be
controlled externally by applying a signal directly to the pins.
2.1.5
Backlight LED Connector (JBD)
This jumper connects the backlight LED strings to the output of the output pin of the backlight boost. Place
jumper between BLOUT and DBL pins.
2.1.6
Backlight LED Configuration Connectors
The user can use these connectors to configure each string’s number of LEDs. The default configuration
is 8 LEDs in series (no jumpers). To achieve a configuration of 2 LEDs in series place a jumper on
location “2”, 3 LEDs on location “3” and so on. For example, placing the jumpers as shown on Figure 2,
configures string 2 with 6 LEDs and string 1 with 7 LEDs.
Figure 2. Backlight LED Configuration Example
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Setup
2.1.7
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PWM (J8)
This pin is the PWM input signal for backlight LED current adjustment. It can be driven externally or, if
connected to pin PWM0 via a jumper, it can be driven by a using the General User Interface (GUI)
software provided.
2.1.8
SDA / SCL (J11)
These connections allow the user to externally control the I2C lines. For independent control of the I2C
lines, do not connect the VIO jumper to either the 3.3-V line or the VIN pin.
2.1.9
LCMOUT, VPOS (JLCM)
These provide access to the regulated output of the LCM bias boost, the VPOS, and the VNEG outputs.
The user can measure LCMOUT, VPOS, and VNEG with reference to GND.
2.1.10
C1, C2 (J15)
These provide access to the charge pump positive and negative flying cap connections. The user can
monitor the voltage waveforms at the flying cap terminals.
2.1.11
BLSW, LCMSW
These connectors can be used to monitor the voltage waveforms at the switch pin of each boost circuit.
2.1.12
VINBL/VIN (J3), VINLCM/VIN (J4)
The user can monitor the inductor current and input current waveforms for each of the two boost blocks by
omitting these jumpers, removing resistors R4 and R6 from the EVM and using separate wires from the
power supply to the inductors and VIN. This removes the input capacitors from the Inductors and eliminate
their filtering effect to the Inductor Current.
2.1.13
JJB1S, JB2S, JB3S, and JB4S: Backlight String Current Measurements
The LM36274EVM provides a way to accurately measure the current through the backlight LED strings on
board. Resistor RB1S, RB2S, RB3S, and RB4S (10 Ω, 0.1%) are placed between the LED strings and the
current sink inputs of the LM36274. The user can measure the voltage across the resistor(s) and calculate
the current(s) through the resistor(s) by dividing the voltage by 10 Ω.
2.2
Setup
The input voltage range for the LM36274 is 2.7 V to 5 V. The on-board backlight LEDs should be
connected, and the jumpers should be properly configured for proper operation. This is the recommended
setting, using shorting blocks:
• VIO to VIN (J12)
• HWEN to VIO (J7)
• Backlight LEDs (JBD) shorted
• J3 shorted or R4 = 0 Ω
• J4 shorted or R6 = 0 Ω
• PWM to PWM0 (J8) or external signal
In this configuration, the device powers up when power is applied and all outputs can be enabled. Refer to
Figure 3 for recommended jumper placement.
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Figure 3. LM36274EVM Recommended Jumper Placement
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Schematic
3
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Schematic
PWM0
SCL
PWM1
J101
1
3
5
7
9
3.3V
PWM2
ZZ5
Assembly Note
Place shunt SH-EN on J7
ZZ6
Assembly Note
Place shunt SH-VIO on J12 pins 1&2
ZZ7
Assembly Note
Place shunt SH-PWM on J8
2
4
6
8
10
SDA
ZZ8
Assembly Note
Place shunt SH-LCM1 on J9 pins 1 & 2
ZZ9
Assembly Note
Place shunt SH-LCM2 on J10 pins 1 & 2
ZZ10
Assembly Note
Place shunt SH-BD on JBD pins 2&3
GND
VINLCM
J2
VINBL
J1
JLCM
SH-BD
1
2
3
1
2
3
1
2
1
2
JBD
DSH
VINB
D103
White
J13
J15
4
3
2
1
4
3
2
1
1
1
J14
GND
BLED1
RB1S
10.0
1
2
JB1S
BLED2
RB2S
10.0
2
1
2
1
2
1
2
1
2
1
2
1
2
D407
White
1
1
D208
White
2
GND GNDS
D308
White
2
D108
White
CF2
1
D406
White
D307
White
2
D207
White
2
LCMEN2
2
1
SH-LCM2
D107
White
PWM2
D405
White
D306
White
1
1
2
D206
White
1
VIO
3
2
1
2
1
J10
D404
White
D305
White
2
D106
White
LCMEN1
D304
White
D205
White
2
VIO PWM1
1
D204
White
D105
White
PWM
3
2
1
D403
White
D408
White
1
2
RB3S
10.0
JB2S
2
D104
White
1
J9
SH-LCM1
D303
White
C+
LM36274YFF
PWM0
2
1
2
D203
White
1
J8
SH-PWM
D402
White
2
RSCL
1.0k
E2
2
RSDA
1.0k
E3
AGND
D302
White
1
VIO
A4
A3
D202
White
2
VIN
CFLY
10µF
CP_GND
LCM_GND
CPOS
10µF
1
C-
D102
White
CNEG
10µF
2
LCM_EN2
A2
E4
1
B2
BL_GND
2
LCM_EN1
B4
D401
White
1
B3
POS
POS
J4C
D301
White
2
PWM
D201
White
2
1
J4A
1
3.3V
3
2
1
SH-VIO
SCL
1
2
J3C
2
J12
C2
D101
White
NEG
A1
J3A
1
CF+
NEG
J2C
2
3
2
1
SDA
J2A
2
1
1
J11
HWEN
D2
VIO
2
1
IN
J1C
1
J7
SH-EN
F1
E1
D1
C1
LCM_SW
J1A
J4B
1
2
2
C3
SCL
LED1
LED2
LED3
LED4
CD 10µF
2
1
2
SDA
C4
J3B
1
2
2
D3
LCM_OUT
2
1
1
B1
BL_SW
J2B
1
2
2
2.2µH
HWEN
J1B
1
CIN2
10µF
CB 1µF
LCMOUT
2
VIN
VIN
CIN1
10µF
F2
1
D4
OVP
2
LCMSW
BL_SW
1
F4
1
BLOUT
F3
1
BLSW
VLF504015MT-100M
LD
CBATT
100µF
4
3
2
1
4
3
2
1
U1
LB 10µH
J3
2
R4
0
J4
1
R6
0
NSR05F30NXT5G
2
1
2
2
1
1
VINLCM
1
2
RB4S
10.0
JB3S
1
2
JB4S
BLED3
BLED4
8
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Bill of Materials (BOM)
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4
Bill of Materials (BOM)
Table 2. LM36274EVM BOM
DESIGNATOR
DESCRIPTION
MANUFACTURER
PART NUMBER
CB
CAP, CERM, 1 µF, 50 V, +/- 10%, X7R, 0805
TDK
C2012X7R1H105K125AB
CBATT
CAP, CERM, 100 µF, 6.3 V, +/- 20%, X5R,
1206
MuRata
GRM31CR60J107ME39L
CD
CAP, CERM, 10 µF, 6.3 V, +/- 20%, X5R,
0603
TDK
C1608X5R0J106M
CFLY
CAP, CERM, 10 µF, 6.3 V, +/- 20%, X5R,
0603
TDK
C1608X5R0J106M
CIN1
CAP, CERM, 10 µF, 6.3 V, +/- 20%, X5R,
0603
TDK
C1608X5R0J106M
CIN2
CAP, CERM, 10 µF, 6.3 V, +/- 20%, X5R,
0603
TDK
C1608X5R0J106M
CNEG
CAP, CERM, 10 µF, 6.3 V, +/- 20%, X5R,
0603
TDK
C1608X5R0J106M
CPOS
CAP, CERM, 10 µF, 6.3 V, +/- 20%, X5R,
0603
TDK
C1608X5R0J106M
D101
LED, White, SMD
Rohm
SML312WBCW1
D102
LED, White, SMD
Rohm
SML312WBCW1
D103
LED, White, SMD
Rohm
SML312WBCW1
D104
LED, White, SMD
Rohm
SML312WBCW1
D105
LED, White, SMD
Rohm
SML312WBCW1
D106
LED, White, SMD
Rohm
SML312WBCW1
D107
LED, White, SMD
Rohm
SML312WBCW1
D108
LED, White, SMD
Rohm
SML312WBCW1
D201
LED, White, SMD
Rohm
SML312WBCW1
D202
LED, White, SMD
Rohm
SML312WBCW1
D203
LED, White, SMD
Rohm
SML312WBCW1
D204
LED, White, SMD
Rohm
SML312WBCW1
D205
LED, White, SMD
Rohm
SML312WBCW1
D206
LED, White, SMD
Rohm
SML312WBCW1
D207
LED, White, SMD
Rohm
SML312WBCW1
D208
LED, White, SMD
Rohm
SML312WBCW1
D301
LED, White, SMD
Rohm
SML312WBCW1
D302
LED, White, SMD
Rohm
SML312WBCW1
D303
LED, White, SMD
Rohm
SML312WBCW1
D304
LED, White, SMD
Rohm
SML312WBCW1
D305
LED, White, SMD
Rohm
SML312WBCW1
D306
LED, White, SMD
Rohm
SML312WBCW1
D307
LED, White, SMD
Rohm
SML312WBCW1
D308
LED, White, SMD
Rohm
SML312WBCW1
D401
LED, White, SMD
Rohm
SML312WBCW1
D402
LED, White, SMD
Rohm
SML312WBCW1
D403
LED, White, SMD
Rohm
SML312WBCW1
D404
LED, White, SMD
Rohm
SML312WBCW1
D405
LED, White, SMD
Rohm
SML312WBCW1
D406
LED, White, SMD
Rohm
SML312WBCW1
D407
LED, White, SMD
Rohm
SML312WBCW1
D408
LED, White, SMD
Rohm
SML312WBCW1
DSH
Diode, Schottky, 30 V, 0.5 A, 0402 Diode
ON Semi
NSR05F30NXT5G
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Bill of Materials (BOM)
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Table 2. LM36274EVM BOM (continued)
10
GND
Standard Banana Jack, Insulated, Black
Keystone
6092
GNDS
Test Point, Compact, Black, TH
Keystone
5006
J1
Header, 100mil, 2x1, Gold, TH
Samtec
TSW-102-07-G-S
J1A
Header, 100mil, 2x1, Gold, TH
Samtec
TSW-102-07-G-S
J1B
Header, 100mil, 4x1, Gold, TH
Samtec
TSW-104-07-G-S
J1C
Header, 100mil, 2x1, Gold, TH
Samtec
TSW-102-07-G-S
J2
Header, 100mil, 2x1, Gold, TH
Samtec
TSW-102-07-G-S
J2A
Header, 100mil, 2x1, Gold, TH
Samtec
TSW-102-07-G-S
J2B
Header, 100mil, 4x1, Gold, TH
Samtec
TSW-104-07-G-S
J2C
Header, 100mil, 2x1, Gold, TH
Samtec
TSW-102-07-G-S
J3
Header, 100mil, 2x1, Gold, TH
Samtec
TSW-102-07-G-S
J3A
Header, 100mil, 2x1, Gold, TH
Samtec
TSW-102-07-G-S
J3B
Header, 100mil, 4x1, Gold, TH
Samtec
TSW-104-07-G-S
J3C
Header, 100mil, 2x1, Gold, TH
Samtec
TSW-102-07-G-S
J4
Header, 100mil, 2x1, Gold, TH
Samtec
TSW-102-07-G-S
J4A
Header, 100mil, 2x1, Gold, TH
Samtec
TSW-102-07-G-S
J4B
Header, 100mil, 4x1, Gold, TH
Samtec
TSW-104-07-G-S
J4C
Header, 100mil, 2x1, Gold, TH
Samtec
TSW-102-07-G-S
J7
Header, 100mil, 2x1, Gold, TH
Samtec
TSW-102-07-G-S
J8
Header, 100mil, 2x1, Gold, TH
Samtec
TSW-102-07-G-S
J9
Header, 100mil, 3x1, Gold, TH
Samtec
TSW-103-07-G-S
J10
Header, 100mil, 3x1, Gold, TH
Samtec
TSW-103-07-G-S
J11
Header, 100mil, 3x1, Gold, TH
Samtec
TSW-103-07-G-S
J12
Header, 100mil, 3x1, Gold, TH
Samtec
TSW-103-07-G-S
J13
Header, 100mil, 2x1, Gold, TH
Samtec
TSW-102-07-G-S
J14
Header, 100mil, 2x1, Gold, TH
Samtec
TSW-102-07-G-S
J15
Header, 100mil, 2x1, Gold, TH
Samtec
TSW-102-07-G-S
J101
Header (shrouded), 100mil, 5x2, HighTemperature, Gold, TH
3M
N2510-6002-RB
JB1S
Header, 100mil, 2x1, Gold, TH
Samtec
TSW-102-07-G-S
JB2S
Header, 100mil, 2x1, Gold, TH
Samtec
TSW-102-07-G-S
JB3S
Header, 100mil, 2x1, Gold, TH
Samtec
TSW-102-07-G-S
JB4S
Header, 100mil, 2x1, Gold, TH
Samtec
TSW-102-07-G-S
JBD
Header, 100mil, 3x1, Gold, TH
Samtec
TSW-103-07-G-S
JLCM
Header, 100mil, 3x1, Gold, TH
Samtec
TSW-103-07-G-S
LB
Inductor, Shielded, Ferrite, 10 µH, 1.44 A,
0.12 ohm, SMD
TDK
VLF504015MT-100M
LBL1
Thermal Transfer Printable Labels, 0.650" W
x 0.200" H - 10,000 per roll
Brady
THT-14-423-10
LD
Inductor, Shielded, Metal Composite, 2.2 µH,
1.5 A, 0.12 ohm, SMD
Toko
DFE201612P-2R2M=P2
R4
RES, 0, 5%, 0.25 W, 1206
Yageo America
RC1206JR-070RL
R6
RES, 0, 5%, 0.25 W, 1206
Yageo America
RC1206JR-070RL
RB1S
RES, 10.0, 0.1%, 0.1 W, 0805
Bourns
CRT0805-BY-10R0ELF
RB2S
RES, 10.0, 0.1%, 0.1 W, 0805
Bourns
CRT0805-BY-10R0ELF
RB3S
RES, 10.0, 0.1%, 0.1 W, 0805
Bourns
CRT0805-BY-10R0ELF
RB4S
RES, 10.0, 0.1%, 0.1 W, 0805
Bourns
CRT0805-BY-10R0ELF
RSCL
RES, 1.0 k, 5%, 0.1 W, 0603
Vishay-Dale
CRCW06031K00JNEA
RSDA
RES, 1.0 k, 5%, 0.1 W, 0603
Vishay-Dale
CRCW06031K00JNEA
SH-BD
Shunt, 100mil, Gold plated, Black
3M
969102-0000-DA
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Bill of Materials (BOM)
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Table 2. LM36274EVM BOM (continued)
SH-EN
Shunt, 100mil, Gold plated, Black
3M
969102-0000-DA
SH-LCM1
Shunt, 100mil, Gold plated, Black
3M
969102-0000-DA
SH-LCM2
Shunt, 100mil, Gold plated, Black
3M
969102-0000-DA
SH-PWM
Shunt, 100mil, Gold plated, Black
3M
969102-0000-DA
SH-VIO
Shunt, 100mil, Gold plated, Black
3M
969102-0000-DA
U1
FOUR CHANNEL LED DRIVER + LCD BIAS
SUPPLY, YFF0024ADAC
Texas Instruments
LM36274YFF
VIN
Test Point, Compact, Red, TH
Keystone
5005
VINBL
Standard Banana Jack, Insulated, Red
Keystone
6091
VINLCM
BANANA JACK, 15A, Insulated, Nylon,Yellow
Emerson Network
Power
108-0907-001
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Board Layout
5
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Board Layout
Figure 4, Figure 5, Figure 6, Figure 7, Figure 8 and Figure 9 show the board layout for the LM36274EVM.
The EVM offers resistors, capacitors, and jumpers to enable the device and to configure it as desired.
12
Figure 4. Top Assembly Layer
Figure 5. Bottom Assembly Layer
Figure 6. Top Layer Routing
Figure 7. Middle Layer 1 Routing
Figure 8. Middle Layer 2 Routing
Figure 9. Bottom Routing
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6
USB Interface Board and I2C-Compatible Interface Program
USB Interface Board and I2C-Compatible Interface Program
Texas Instruments has created an I2C-compatible program and USB docking board that helps exercise the
part in a simple way. This section describes how to use the USB docking board and interface software.
The LM36274EVM has the means to “plug into” the USB docking board. The USB docking board provides
all the control signals for the simple interface. Power to the part must be provided externally. A USB cable
(provided) must be connected to the board from a PC.
The I2C-compatible interface program provides all of the control that the LM36274 device 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 10
shows the software interface upon start-up.
The GUI is configured in register blocks. Please refer to the Register Maps section of the LM36274 data
sheet (SNVSAC0) for register configuration details.
Figure 10. LM36274 General User Interface
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6.1
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2
Establishing I C Communication
1. If the USB2ANY hardware is connected to the PC properly, the message displayed on the lower left
corner of the GUI should display “Hardware Connected”. If the message is “Hardware Disconnected”,
unplug and plug the USB cable on the USB2ANY box.
2. Select the “Controls” icon, and the “Backlight” tab on the page that pops-up, then perform a “Read” of
register 0x01 (Revision/Vendor). The return values should be VENDOR = 01 and REV = 00. If it
returns nothing it means communication is not established properly; ensure power supply is properly
connected and the jumpers are in place.
3. Once I2C communication has been established, select one of the “BLED” boxes and “BL_EN” (they
should display “ON”) on “Reg. 0x08 BACKLIGHT ENABLE REGISTER”. The field STATUS on the
bottom right of the GUI should say “No error” or “Success” if the write command was properly received
and the backlight LEDs should glow. Note: The default backlight OVP setting for the LM36274 is 21 V,
so under default settings the backlight boost circuit operates in OVP mode, and the light is dim. Refer
to Section 6.6 for details.
4. If the backlight LEDs don’t glow, and there are no error messages in the “STATUS” window, close the
GUI, recycle power to the LM36274, unplug, then plug the USB2ANY cable from the USB2ANY box
and try again.
6.2
GUI Controls
There are two control views available: “Registers” and “Controls”. These fields are synchronized so any
changes performed in one view are automatically updated in the other.
6.2.1
Registers View
Figure 11 shows the Registers interface. The user can either enter the desired hex value to the registers
(“Current Value” column), perform a bit-wise configuration of any register fields by double-clicking on the
corresponding register bit or configure a register field by selecting the desired entry in the "Value" dropdown box located under the "Field View". "Field View" displays the description of all fields of the selected
register. Each register can be read independently or all registers can be read at once by utilizing the
“Read” and “Read All” buttons, respectively. The data is written to the register(s) in one of two ways,
depending on the “Update Mode” field selection: In Immediate mode, the register data is written
immediately following a “Current Value”, an individual bit or a "Value" change. In “Deferred” mode, the
displayed data is written to all registers upon depression of the “Write” button.
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Figure 11. LM36274 Register Control View
6.2.2
Controls View
There are two tabs available under the “Controls” interface: "Backlight" (Figure 11) and "LCD Bias”
(Figure 11). The left side of these tabs contains the controls for the corresponding block of the LM36274.
The right side contains register controls and functions that are common to both blocks. Similarly to the
Registers View control, the LM36274 GUI provides the ability to execute the I2C write commands
immediately (one click execution) if the “Auto Write Registers” box is checked or upon performing a
“WRITE ALL” operation if the “Auto Write Registers” box is not checked.
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Figure 12. LM36274 Backlight Control View
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Figure 13. LM36274 LCD Bias Control View
6.3
Saving and Loading Register Settings
The LM36274 EVM GUI software provides the option to save all register settings and re-load them. The
user can configure the registers and select “Save” in the “Registers” window of the GUI or can use the
"Save Registers" option of the "File" drop-down menu. Enter a file path and file name when prompted and
select “Save” to save all current register settings. Any saved register configuration can be loaded by
selecting “Load” in the “Registers” window of the GUI or "Load Registers" in the "File" drop-down. Similarly
to the save function, when prompted navigate to the location where the file that contains the desired
register configuration is stored and select “Open” to load the register values.
6.4
I2C Communication Block
The GUI provides fields that allow for general I2C interaction. Simply populate the fields with the desired
internal register address and data (for write operation) and perform a read or write action. The general I2C
communication interface allows for burst “write” and “read” operations. As an example, populating the
internal address field with “03”, the “# of bytes to “READ/WRITE” field with “5” and the “DATA” field with
“02 a5 80 13 2f”, then selecting “WRITE” would attempt to write data 0x02 to register 0x03, data 0xa5 to
register 0x04, data 0x80 to register 0x05, data 0x13 to register 0x06 and data 0x2f to register 0x07. Field
“STATUS” displays communication error messages. The I2C Communication block is available in the
“Controls” interface.
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Figure 14. I2C Communication Fields
6.5
SWR RESET Button
Selecting the “RESET” button in register 0x08 sets bit[7] of register 0x08 to “1” which causes the LM36274
to configure all registers to their default values. The GUI fields are updated to reflect the register contents.
Upon completion of its register updates, the LM36274 resets bit[7] to “0” (no further action by the user is
required).
6.6
Backlight Operation
The steps below describe how to turn on the backlight LEDs using default settings. Refer to the LM36274
datasheet and/or the register field descriptions of the GUI to exercise the different configurations and
options of the backlight block.
1. Configure the number of backlight LEDs for both strings as desired (refer to Section 2.1)
2. Select the desired BL OVP voltage level in register 0x02, based on the number of LEDs used.
3. Select the appropriate BL L-MIN value (inductor value used, 10-uH assembled) and BL OCP (backlight
over-current limit) in register 0x11.
4. Turn on one or more backlight strings by selecting one or more of the “BLED1”, “BLED2”, “BLED3”,
“BLED4” boxes and box “BL_EN” in register 0x08.
Figure 15. Backlight Enable Register Fields
6.7
VPOS/VNEG Operation
1. Select the desired LCM Mode from the drop-down menu in register 0x09.
2. I2C Mode: VPOS and VNEG can be enabled in I2C mode by the corresponding field in register 0x09.
Field “EXT ENABLE” must be disabled in order to turn VPOS and/or VNEG on in I2C mode.
3. External Node: Enable “EXT EN” in register 0x09, then set pins LCMEN1 and LCMEN2 high to enable
VPOS and VNEG, respectively.
Figure 16. LCM Display Bias Configuration1 Register Fields
6.8
Flags Register
Register 0x0F (right side of GUI) contain the fault and flag bits of the LM36274. Some bits are report only
while others are fault bits (see LM36274 datasheet (SNVSAC0) for fault/flag definitions and options).
Faults inhibit subsequent enabling of the affected block, while flags do not. Select “READ” to read the
fault/flag status and clear the register.
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Figure 17. Flags Read Register
6.9
General Register Read/Write
The LM36274EVM GUI includes a block that allows for a quick register read or write action. Selecting the
“READ ALL” button performs a read of all registers and updates the corresponding fields of the GUI.
Populating the register fields with the desired data and performing a “WRITE ALL” writes the data to all
registers and updates the corresponding GUI fields.
Figure 18. General Register Fields
6.10 GPIO Controls
The LM36274EVM provides the user with the capability to control the PWM, LCMEN1, and LCMEN2
inputs of the LM36274 without the need of an external supply. In order for the signals to be applied to the
corresponding LM36274 input pin(s) the appropriate jumpers need to be placed (see Section 2.1 for PWM,
LCMEN1, and LCMEN2 jumper placement).
The user can choose among a few frequencies and duty cycle increment combinations of continuous
pulses for the backlight PWM input pin. A duty cycle of 0% sets the voltage low, and a duty cycle of 100%
sets the voltage high.
Figure 19. Backlight PWM Controls
To force continuous pulses on the LCMEN1 and LCMEN2 pins, the user can select a period and duty
cycle from the drop-down menus then select the “LCMEN1” and “LCMEN2” buttons. A duty cycle of 0%
sets the voltage low, and a duty cycle of 100% sets the voltage high.
Figure 20. LCD Bias GPIO Controls
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19
STANDARD TERMS AND CONDITIONS FOR EVALUATION MODULES
1.
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.
1.1 EVMs are intended solely for product or software developers for use in a research and development setting to facilitate feasibility
evaluation, experimentation, or scientific analysis of TI semiconductors products. EVMs have no direct function and are not
finished products. EVMs shall not be directly or indirectly assembled as a part or subassembly in any finished product. For
clarification, any software or software tools provided with the EVM (“Software”) shall not be subject to the terms and conditions
set forth herein but rather shall be subject to the applicable terms and conditions that accompany such Software
1.2 EVMs are not intended for consumer or household use. EVMs may not be sold, sublicensed, leased, rented, loaned, assigned,
or otherwise distributed for commercial purposes by Users, in whole or in part, or used in any finished product or production
system.
2
Limited Warranty and Related Remedies/Disclaimers:
2.1 These terms and conditions do not apply to Software. The warranty, if any, for Software is covered in the applicable Software
License Agreement.
2.2 TI warrants that the TI EVM will conform to TI's published specifications for ninety (90) days after the date TI delivers such EVM
to User. Notwithstanding the foregoing, TI shall not be liable for any defects that are caused by neglect, misuse or mistreatment
by an entity other than TI, including improper installation or testing, or for any EVMs that have been altered or modified in any
way by an entity other than TI. Moreover, TI shall not be liable for any defects that result from User's design, specifications or
instructions for such EVMs. Testing and other quality control techniques are used to the extent TI deems necessary or as
mandated by government requirements. TI does not test all parameters of each EVM.
2.3 If any EVM fails to conform to the warranty set forth above, TI's sole liability shall be at its option to repair or replace such EVM,
or credit User's account for such EVM. TI's liability under this warranty shall be limited to EVMs that are returned during 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
Regulatory Notices:
3.1 United States
3.1.1
Notice applicable to EVMs not FCC-Approved:
This kit is designed to allow product developers to evaluate electronic components, circuitry, or software associated with the kit
to determine whether to incorporate such items in a finished product and software developers to write software applications for
use with the end product. This kit is not a finished product and when assembled may not be resold or otherwise marketed unless
all required FCC equipment authorizations are first obtained. Operation is subject to the condition that this product not cause
harmful interference to licensed radio stations and that this product accept harmful interference. Unless the assembled kit is
designed to operate under part 15, part 18 or part 95 of this chapter, the operator of the kit must operate under the authority of
an FCC license holder or must secure an experimental authorization under part 5 of this chapter.
3.1.2
For EVMs annotated as FCC – FEDERAL COMMUNICATIONS COMMISSION Part 15 Compliant:
CAUTION
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not
cause harmful interference, and (2) this device must accept any interference received, including interference that may cause
undesired operation.
Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to
operate the equipment.
FCC Interference Statement for Class A EVM devices
NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of
the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is
operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to
correct the interference at his own expense.
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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. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance
with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference
will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more
of the following measures:
•
•
•
•
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
3.2 Canada
3.2.1
For EVMs issued with an Industry Canada Certificate of Conformance to RSS-210
Concerning EVMs Including Radio Transmitters:
This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions:
(1) this device may not cause interference, and (2) this device must accept any interference, including interference that may
cause undesired operation of the device.
Concernant les EVMs avec appareils radio:
Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation
est autorisée aux deux conditions suivantes: (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit
accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.
Concerning EVMs Including Detachable Antennas:
Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser)
gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type
and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for
successful communication. This radio 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 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 réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et
d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage
radioélectrique à l'intention des autres utilisateurs, il faut choisir le type d'antenne et son gain de sorte que la puissance isotrope
rayonnée équivalente (p.i.r.e.) ne dépasse pas l'intensité nécessaire à l'établissement d'une communication satisfaisante. Le
présent émetteur radio a été approuvé par Industrie Canada pour fonctionner avec les types d'antenne énumérés dans le
manuel d’usage et ayant un gain admissible maximal et l'impédance requise pour chaque type d'antenne. Les types d'antenne
non inclus dans cette liste, ou dont le gain est supérieur au gain maximal indiqué, sont strictement interdits pour l'exploitation de
l'émetteur
3.3 Japan
3.3.1
Notice for EVMs delivered in Japan: Please see http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_01.page 日本国内に
輸入される評価用キット、ボードについては、次のところをご覧ください。
http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_01.page
3.3.2
Notice for Users of EVMs Considered “Radio Frequency Products” in Japan: EVMs entering Japan may not be certified
by TI as conforming to Technical Regulations of Radio Law of Japan.
If User uses EVMs in Japan, not certified to Technical Regulations of Radio Law of Japan, User is required by Radio Law of
Japan to follow the instructions below with respect to EVMs:
1.
2.
3.
Use EVMs in a shielded room or any other test facility as defined in the notification #173 issued by Ministry of Internal
Affairs and Communications on March 28, 2006, based on Sub-section 1.1 of Article 6 of the Ministry’s Rule for
Enforcement of Radio Law of Japan,
Use EVMs only after User obtains the license of Test Radio Station as provided in Radio Law of Japan with respect to
EVMs, or
Use of EVMs only after User obtains the Technical Regulations Conformity Certification as provided in Radio Law of Japan
with respect to EVMs. Also, do not transfer EVMs, unless User gives the same notice above to the transferee. Please note
that if User does not follow the instructions above, User will be subject to penalties of Radio Law of Japan.
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【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.
2.
3.
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。
実験局の免許を取得後ご使用いただく。
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
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4
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.
4.2 User must read and apply the user guide and other available documentation provided by TI regarding the EVM prior to handling
or using the EVM, including without limitation any warning or restriction notices. The notices contain important safety information
related to, for example, temperatures and voltages.
4.3 Safety-Related Warnings and Restrictions:
4.3.1
User shall operate the EVM within TI’s recommended specifications and environmental considerations stated in the user
guide, other available documentation provided by TI, and any other applicable requirements and employ reasonable and
customary safeguards. Exceeding the specified performance ratings and specifications (including but not limited to input
and output voltage, current, power, and environmental ranges) for the EVM may cause personal injury or death, or
property damage. If there are questions concerning performance ratings and specifications, User should contact a TI
field representative prior to connecting interface electronics including input power and intended loads. Any loads applied
outside of the specified output range may also result in unintended and/or inaccurate operation and/or possible
permanent damage to the EVM and/or interface electronics. Please consult the EVM user guide prior to 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, current sense resistors, and heat sinks, which can be identified using the
information in the associated documentation. When working with the EVM, please be aware that the EVM may become
very warm.
4.3.2
EVMs are intended solely for use by technically qualified, professional electronics experts who are familiar with the
dangers and application risks associated with handling electrical mechanical components, systems, and subsystems.
User assumes all responsibility and liability for proper and safe handling and use of the EVM by User or its employees,
affiliates, contractors or designees. User assumes all responsibility and liability to ensure that any interfaces (electronic
and/or mechanical) between the EVM and any human body are designed with suitable isolation and means to safely
limit accessible leakage currents to minimize the risk of electrical shock hazard. User assumes all responsibility and
liability for any improper or unsafe handling or use of the EVM by User or its employees, affiliates, contractors or
designees.
4.4 User assumes all responsibility and liability to determine whether the EVM is subject to any applicable international, federal,
state, or local laws and regulations related to User’s handling and use of the EVM and, if applicable, User assumes all
responsibility and liability for compliance in all respects with such laws and regulations. User assumes all responsibility and
liability for proper disposal and recycling of the EVM consistent with all applicable international, federal, state, and local
requirements.
5.
Accuracy of Information: To the extent TI provides information on the availability and function of EVMs, TI attempts to be as accurate
as possible. However, TI does not warrant the accuracy of EVM descriptions, EVM availability or other information on its websites as
accurate, complete, reliable, current, or error-free.
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6.
Disclaimers:
6.1 EXCEPT AS SET FORTH ABOVE, EVMS AND ANY WRITTEN DESIGN MATERIALS PROVIDED WITH THE EVM (AND THE
DESIGN OF THE EVM ITSELF) ARE PROVIDED "AS IS" AND "WITH ALL FAULTS." TI DISCLAIMS ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED, REGARDING SUCH ITEMS, INCLUDING BUT NOT LIMITED TO ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF ANY
THIRD PARTY PATENTS, COPYRIGHTS, TRADE SECRETS OR OTHER INTELLECTUAL PROPERTY RIGHTS.
6.2 EXCEPT FOR THE LIMITED RIGHT TO USE THE EVM SET FORTH HEREIN, NOTHING IN THESE TERMS AND
CONDITIONS SHALL BE CONSTRUED AS GRANTING OR CONFERRING ANY RIGHTS BY LICENSE, PATENT, OR ANY
OTHER INDUSTRIAL OR INTELLECTUAL PROPERTY RIGHT OF TI, ITS SUPPLIERS/LICENSORS OR ANY OTHER THIRD
PARTY, TO USE THE EVM IN ANY FINISHED END-USER OR READY-TO-USE FINAL PRODUCT, OR FOR ANY
INVENTION, DISCOVERY OR IMPROVEMENT MADE, CONCEIVED OR ACQUIRED PRIOR TO OR AFTER DELIVERY OF
THE EVM.
7.
USER'S INDEMNITY OBLIGATIONS AND REPRESENTATIONS. USER WILL DEFEND, INDEMNIFY AND HOLD TI, ITS
LICENSORS AND THEIR REPRESENTATIVES HARMLESS FROM AND AGAINST ANY AND ALL CLAIMS, DAMAGES, LOSSES,
EXPENSES, COSTS AND LIABILITIES (COLLECTIVELY, "CLAIMS") ARISING OUT OF OR IN CONNECTION WITH ANY
HANDLING OR USE OF THE EVM THAT IS NOT IN ACCORDANCE WITH THESE TERMS AND CONDITIONS. THIS OBLIGATION
SHALL APPLY WHETHER CLAIMS ARISE UNDER STATUTE, REGULATION, OR THE LAW OF TORT, CONTRACT OR ANY
OTHER LEGAL THEORY, AND EVEN IF THE EVM FAILS TO PERFORM AS DESCRIBED OR EXPECTED.
8.
Limitations on Damages and Liability:
8.1 General Limitations. IN NO EVENT SHALL TI BE LIABLE FOR ANY SPECIAL, COLLATERAL, INDIRECT, PUNITIVE,
INCIDENTAL, CONSEQUENTIAL, OR EXEMPLARY DAMAGES IN CONNECTION WITH OR ARISING OUT OF THESE
TERMS ANDCONDITIONS OR THE USE OF THE EVMS PROVIDED HEREUNDER, REGARDLESS OF WHETHER TI HAS
BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. EXCLUDED DAMAGES INCLUDE, BUT ARE NOT LIMITED
TO, COST OF 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 TI'S AGGREGATE LIABILITY FROM ANY WARRANTY OR OTHER OBLIGATION
ARISING OUT OF OR IN CONNECTION WITH THESE TERMS AND CONDITIONS, OR ANY USE OF ANY TI EVM
PROVIDED HEREUNDER, EXCEED THE TOTAL AMOUNT PAID TO TI FOR THE PARTICULAR UNITS SOLD UNDER
THESE TERMS AND CONDITIONS WITH RESPECT TO WHICH LOSSES OR DAMAGES ARE CLAIMED. THE EXISTENCE
OF MORE THAN ONE CLAIM AGAINST THE PARTICULAR UNITS SOLD TO USER UNDER THESE TERMS AND
CONDITIONS SHALL NOT ENLARGE OR EXTEND THIS LIMIT.
9.
Return Policy. Except as otherwise provided, TI does not offer any refunds, returns, or exchanges. Furthermore, no return of EVM(s)
will be accepted if the package has been opened and no return of the EVM(s) will be accepted if they are damaged or otherwise not in
a resalable condition. If User feels it has been incorrectly charged for the EVM(s) it ordered or that delivery violates the applicable
order, User should contact TI. All refunds will be made in full within thirty (30) working days from the return of the components(s),
excluding any postage or packaging costs.
10. Governing Law: These terms and conditions shall be governed by and interpreted in accordance with the laws of the State of Texas,
without reference to conflict-of-laws principles. User agrees that non-exclusive jurisdiction for any dispute arising out of or relating to
these terms and conditions lies within courts located in the State of Texas and consents to venue in Dallas County, Texas.
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
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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. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and
complete. All semiconductor products (also referred to herein as “components”) are sold subject to TI’s terms and conditions of sale
supplied at the time of order acknowledgment.
TI warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in TI’s terms
and conditions of sale of semiconductor products. Testing and other quality control techniques are used to the extent TI deems necessary
to support this warranty. Except where mandated by applicable law, testing of all parameters of each component is not necessarily
performed.
TI assumes no liability for applications assistance or the design of Buyers’ products. Buyers are responsible for their products and
applications using TI components. To minimize the risks associated with Buyers’ products and applications, Buyers should provide
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