ISL45043IRZ-T - Intersil - Datasheet.Directory

AN1275.0

ISL45041EVAL1Z User’s Manual

Description

The ISL45041EVAL1Z is the evaluation board for the

ISL45041 I2C LCD Module Calibrator . All materials of the kit

are RoHS compliant. The evaluation kit comes complete

with: ISL45041EVAL1Z board, USB to I2C converter board,

USB cable to connect the converter board to a PC, Power

and I2C cables for the ISL45041EVAL board. The Software

and related documentation for the eval kit are downloadable

from Intersil’s website at www.intersil.com.

The USB to I2C converter board (USB-I2CIO Rev B2) allows

the user to adjust and program the ISL45041 VCOM voltage

using a PC.

This application note will guide the user through the process

of installing the USB to I2C drivers, ISL45041 Graphical User

Interface (GUI) and configuring the ISL45041EVAL1Z board

for evaluation of the ISL45041.

Additional equipment require d are two pow er supplies, one

volt meter and a PC (Windows 98/XP/2000 machine with a

standard USB port). The board is designed to operate from an

AVDD supply (5V to 18V), and VDD supply (2.5V to 3.6V).

Installing the ISL4504x Software

1. Log on to www.intersil.com/cda/home.

2. In the upper right corner of the webpage, type in

ISL45041 in the white box and click search. This will bring

you to the product information page. Click on the data

sheet link Datasheets, Related Docs & Simulations. Now

click on the Design Model(s) link Intersil ISL4504x I2C

DCP Installer V201.

3. Click on Run. If another screen pops up with the message

“The publisher could not be verified. Are you sure you

want to run this software?” Click Run. A software setup

wizard will appear, click: next, next, next, install. The

install will create a directory call “Intersil” in the

“C:\Program Files” Windows (All Programs) directory.

Then a sub directory call ed ISL4504x is created in the

Intersil directory. All files needed, including an Uninstall

program, will be placed there. The USB installation is

self-registering. However, should a "New USB Device

Detect: screen appear when the USB controller is

connected, then select "Have Disk" and browse to the

same directory and the application "C:\Program

Files\Intersil\ISL4 504x" This directory will contain the

needed files the USB installer needs."

4. Before initializing the software GUI, you need to connect the

hardware. Reference the section titled “Connecting the

Hardware” on page 4 and “W arning/Status LEDs” on

page 5. Once the hardware is connected, Click S t art->All

Programs->Intersil->ISL4504x ->ISL4504x (Figure 2) to

initialize the software GUI. The user screen will appear as

shown in Figure 3. (Note if the USB Contoller is not

connected, you will see two message boxes. The first

informs of the inability to get device information from the

controller. The second message box tells you to click OK

then connect the USB controller and re-start the application.

Click S t art->All Programs->Intersil->ISL4504x ->

ISL4504x).

FIGURE 1. USB-I2CIO BOARD (MADE BY INTERSIL)

LEDs

Application Note October 16, 2006

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774 |Intersil (and design) is a registered trademark of Intersil Americas Inc.

All other trademarks mentioned are the property of their respective owners.

2AN1275.0

October 16, 2006

FIGURE 2. INSTALLING ISL4504x EVALUATION SOFTWARE

FIGURE 3. GUI SCREEN AT START-UP

Application Note 1275

3AN1275.0

October 16, 2006

WARNING

/STATUS LEDs

SELECTION

EEPROM

WRITTEN

DATA

READ DATA

WRITE MANUALLY

(ALSO WRITTEN EVERY TIME

THE POSITION IS CHANGED)

READ THE REGISTER VALUE

(COULD BE SELECTED TO READ

BACK EVERY TIME THE REGISTER

IS WRITTEN -- “AUTO READ”

SET AND READ

FIGURE 4. GUI SCREEN TO PROGRAM ISL45041

SELECT FOR

REPETITIVE

WRITE OR

READ CYCLES

SETS INTERVAL

TIME BETWEEN

WRITE OR READ

COMMANDS

STOPS WRIT E

OR READ CYCLES

SHOWS JUMPERS

TO CONFIGURE THE

ISL45041

CLICK TO EXIT PROGRAM

Application Note 1275

4AN1275.0

October 16, 2006

Connecting the Hardware

1. Connect the ISL45041EVAL1Z board to the Intersil USB

controller board as shown in Figure 5. Note: Connect the

I2C cable as shown in Figure 5.

2. Set the VDD power supply (green wire) to 3.0V. Set the

AVDD power supply (red wire) to 10.0V.

3. Connect the power supply cable to the ISL45041EV AL1Z

board. Note: Connect the power cable as shown in

Figure 5. T urn on the power supplies to power up the

ISL45041EVAL1Z board (make sure the cables are

connected properly -- RED = AVDD; GREEN = VDD;

BLACK = GND).

FIGURE 5. ISL45041EVAL1Z TEST SETUP

I2C CABLE

POWER CABLE

I2C CABLE

ISL45041IR

J16: SCL/SCL_C CLOCK INPUT

SELECTION

ISL45041

POWER SUPPLY

(AVDD AND VDD)

SELECTION

J5 AND J9:

J4: WPp POLARITY CONTROL

(ISL45041)

J6 AND J7: EXTERNAL RESISTOR

DIVIDER SELECTION

POWER CONNECTOR

(GND, AVDD, VDD)

I2C CONNECTOR

(SCL, SDA, GND)

J10: SET RESISTOR

SELECTION

FIGURE 6. JUMPER SETTINGS FOR THE ISL45041EVAL1Z BOARD

OUTPUT VOLTAGE CAN BE

OBSERVED ON J8

Application Note 1275

5AN1275.0

October 16, 2006

Warning/Status LEDs

USB Status - Green = Communications with the USB

Controller board is working

DCP Comm - Green = I2C Communications between

controller and the DCP is working

(Clicking the "Open USB" button tests both of these

conditions)

Note: (USB communications is opened and closed for each

DCP access. The controller may be removed and

reconnected between operations. Do not disconnect

controller if the Write/Read TImer is running.)

Write DCP - Green/Dark Green = Toggles between colors

every time a write to the DCP is performed.

Read DCP - Green/Dark Green = Toggles between colors

every time a read from the DCP is performed.

(Both Write and Read LEDs will turn red if an error is detected.

The DCP COMM will also turn red if an error is detected.)

Timer Status - Changes color every time a timer controlled

Write and/or Read is performed

Configuring the ISL45041EVAL1Z Jumpers

Jumpers

The board is equipped with jumpers to enable the user to

adjust the SET current limit and values of output voltage with

different values of R1 and R2 (reference schematic in

Figure 7). Jumpers not used for the ISL45041 are J3, J6 and

J16. These jumpers should be left open.

J4 is used for the Write Protect function test. To be able to

program the part, J4 needs to be in the 1-2 position connecting

the WP pin to VDD. The WP pin of the ISL45041 has an

internal pull-down resistor . If J4 is open or in the 2-3 position

(connecting this pin to GND) the part is write protected.

J6 and J7 enable the user to change the external resistor

values on the OUT voltage divider. To use the on board

resistors (R13, R14) J6 and J7 need to be in the 2-3 position.

To customi ze the output voltage the user can populate R11

and R12 with their desired resistor values and move J6 and

J7 to the 1-2 position.

J8 provides a convenient connection to monitor the VCOM

output voltage.

J10 enables the user to program the output current limit of

the part. J10 needs to be in the 2-3 position to use the on

board resistor R19. To customize the output current limit the

user can populate R16 with their desired resistor value and

move J10 to the 1-2 po si ti o n.

J5 and J9 provide the power to the ISL45041.

You are now ready to adju st the VCOM output voltage using

the ISL45041EVAL1Z GUI.

Using the GUI to Control the VCOM Output

Voltage

Expected Output Voltage

The ISL45041 provides an output sink current which lowers

the voltage on the external voltage divider (VCOM output

voltage). Equation 1 and Equation 2 can be used to calculate

the output current (IOUT) and output voltage (VOUT) values.

NOTE: Where setting is an integer between 1 and 128.

Tabl e 1 gives the calculated value of VOUT for the eval

board using the on board resistors values of: RSET = 24.9k,

R1 = 200k, R2 = 243k, and VADD = 10V. Also provided in

Table 1 are the HEX values for several settings when writing

to either the Register or EEPROM.

Controlling the Output VCOM Voltage Using the GUI

Figure 4 shows the Graphical User Interface for controlling

the ISL45041EV AL1Z board VCOM output voltage on jumper

J8.

The brief definition of the GUI’s application screen follows:

I2C Slave Address

The I2C 8 bit Slave Address for this part is HEX code 9E or

9F. The I2C 7 bit Save Address for this part is HEX code 4F.

Note the LSB sets the condition for writing to EEPROM (0) or

TABLE 1.

SETTING

VALUE VOUT

HEX VALUE

WRITING TO

HEX VALUE

WRITING TO

EEPROM

1 5.468 01 00

10 5.313 13 12

20 5.141 27 26

30 4.969 3B 3A

40 4.797 4F 4E

50 4.625 63 62

60 4.453 77 76

70 4.281 8B 8A

80 4.109 9F 9E

90 3.936 B3 B2

100 3.764 C7 C6

110 3.592 DB DA

128 3.282 FF FE

IOUT Setting

128

---------------------XAVDD

20 RSET()

-----------------------------

=(EQ. 1)

VOUT R2

R1 R2+

----------------------

⎝⎠

⎛⎞

AVDD 1 Setting

128

---------------------XR1

20 RSET()

-----------------------------

–

⎝⎠

⎛⎞

=(EQ. 2)

Application Note 1275

All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.

Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality

Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without

notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and

reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result

from its use. No lice nse is gran t ed by i mpli catio n or other wise u nder an y p a tent or patent right s of Int er sil or it s sub sidi aries.

For information regarding Intersil Corporation and its products, see www.intersil.com

AN1275.0

October 16, 2006

Wrt - DATA - Rd

The Hex number displayed on the left is the logi c string

written to the ISL45041. The Hex number displayed on the

right is the logic string read from the ISL45041. Once again,

the LSB sets the condition for writing to EEPROM (0) or

and the last being HEX FF when writing to the Register and

00 and FE when writing to the EEPROM (see Table 2).

Clicking in the box to the left of the “Write Timer Controlled”

or the “Read T imer Controlled”, will enable the user to select

a time interval between Write or Read commands. Once you

check the box the S top Timer tab will appear . This will enable

the automatic Write or Read cycle to stop. This feature is

handy when evaluating the o peration with a scope. For

single Write or Read cycles click on the I2C-Writ e bu tton or

the I2C-Read button in the middle of the screen.

Programming Mode

Selects either the EEPROM or the Register to write to or

read from.

Set Position

This is how you adjust the ISL45041 output V COM voltage.

Placing your curser on top of the slide bar, click and hold

then drag the mouse to adjust the VCOM voltage. When you

release the mouse, the new HEX value will appear in the Wrt

window.

The window directly below the sl ide bar shows the set bar

position. The true decimal value of the logic code being

written is one less than the number shown. This results

because the ISL45041 has 128 resistive taps for

programming. The digital logic designates 0 to 127 fo r the

possible 128 steps. The slide bar starts at 1 and ends at 128.

Read Position

To read the value of the Register or EEPROM click on the

I2C-Read button in the middle of the screen. This gives a

visual representation of the either the EEPROM or Register

value.

The window directly below the sl ide bar shows the bars

position read from either the Register or EEPROM. The true

decimal value of the logic code being read is one less than

the number shown, for the same reason as above.

Click on the auto read box in the bottom middle of the screen

to automatically read any value selected.

I2C Timing Diagram

Figure 8 shows the I2C timing diagram and expected scope

photos of SCL and SDA when writing all zeros or all ones.

ISL45041EVAL1Z Bill of Materials TABLE 2. ISL45041EVAL1 BOM

PART NUMBER REF. DES. QTY VALUE TOLERANCE POWER PACKAGE JEDEC MANUF. DESCRIPTION

H1046-00104-25V20 C13, C19-21 4 0.1µF 20% SMD-10% SM0805 Kemet Multilayer Cap

T353K106K050AS C15, C17 2 10µF 10% Radial-10% TANT-200 Kemet Tantulum Cap

5000 TP 4 SIP CONN-GEN Keystone Mini Test Point

68000-236-1X3 J3-4 , J6-7, J10, J16 4 1X3 Berg/FCI Connector/Header

68000-236-1X5 Power, I2C 2 1X5 Berg/FCI Connector/Header

69190-202 J5, J9 2 1X2 Berg/FCI Connector/Header

H2512-01002-1/10W1-T R7-8 2 10k 1% 1/10W SMD-1% SM0805 Generic TFC Resistor

H2512-02003-1/10W1-T R13 1 200k 1% 1/10W SMD-1% SM0805 Generic TFC Resistor

H2512-02433-1/10W1-T R14 1 243k 1% 1/10W SMD-1% SM0805 Generic TFC Resistor

H2512-02492-1/10W1-T R19 1 24.9k 1% 1/10W SMD-1% SM0805 Generic TFC Resistor

ISL45041IR U7 1 TDFN 8DFN-3X3A Intersil VCOM

Three Twisted Wire 1 1’ Red, Green,

Black

Male Banana Jack +10V, +3V, GND 3 Red, Green,

Black

Application Note 1275

7AN1275.0

October 16, 2006

R19

24.9k

J16

R16

USER

R7 R8

R13

200k

R11

USER

10k 10k

R14

243k

R12

USER

ISL45043 ISL45041

J10

FIGURE 7. ISL45041EVAL1Z SCHEMATIC

VDD = 3.0V

AVDD = 10.0V

VDD = 3.0V

VCOM OUTPUT

VOLTAGE

Application Note 1275

8AN1275.0

October 16, 2006

I2C Diagrams

FIGURE 8. ISL45041EVAL1Z TIMING DIAGRAM

8 BIT ADDRESS

7 BIT ADDRESS

0 TO WRITE TO EEPROM

Application Note 1275