19-4854; Rev 9/09
DS2782EVKIT+
Standalone Fuel Gauge IC Evaluation Kit
www.maxim-ic.com
FEATURES
Demonstrates the capabilities of the DS2782 Standalone Fuel Gauge, including:
Estimation of available capacity for Li+ cells
Voltage measurement
Current measurement
Current accumulation
Temperature measurement
Information storage
Identification
Interfaces to the USB port of a PC running Windows XP or older operating system
EVALUATION KIT CONTENTS
1 pc. Evaluation Board
1 pc. DS9123O USB Adapter
1 pc. RJ-11 Cable
EQUIPMENT NEEDED
1. A PC running Windows XP or older operating system and an available USB port.
2. Cables with mini-grabber style clips or the ability to solder directly to connection pads.
3. A Lithium-Ion battery and a power supply and/or load circuit.
INDEX
Evaluation Kit Contents
Equipment Needed
Introduction
Setup and Installation
Board Connections
Software Installation
Selecting the COM Port
Program Menus
Menu Windows
Status Register
Program Tabs
Real Time Tab
Parameters Tab
Memory Tab
Log Data Tab
Windows XP is a registered trademark of Microsoft Corp.
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DS2782EVKIT+
INTRODUCTION
The DS2782 evaluation kit (EV kit) makes performance evaluation, software development, and
prototyping with the DS2782 Standalone Fuel Gauge easy. The evaluation board interfaces to a PC
through a DS9123O USB Adapter and RJ-11 cable connection.
The DS2782 EV kit evaluation software gives the user complete control of all functions of the DS2782.
Separate control tabs allow the user access to all EEPROM and RAM memory locations, all control
registers, and real-time updates of all monitored parameters. The software also incorporates a data-
logging feature to monitor a cell over time.
The evaluation board circuit is designed to provide the DS2782 with accurate parameter measurements.
Kit demonstration boards will vary as they are improved upon over time. For information on the
demonstration board circuits refer to the individual board datasheets located online at www.maxim-
ic.com.
SETUP AND INSTALLATION
BOARD CONNECTIONS
Connections to the TSSOP demonstration board are best made either by soldering directly to the pads or
by using cables with mini-grabber clips. Communication to the TSSOP board can be accomplished either
through the RJ-11 jack by connecting the provided standard six conductor RJ-11 cord or by wiring
directly to the SDA, SCL and P- pads. In the latter case, the size of the board can be reduced by snapping
off the RJ-11 jack along the break line, see Figure 1. To utilize the demonstration software, the SDA,
SCL and PAC- lines must be connected to the DS9123O communication brick using either of the two
methods described.
Break Line
SCL
B-
RJ-11
PIO
P-
B+
SDA
Figure 1: Communication Connections
Figures 2a and 2b show the recommended circuits to simulate charging and discharging. The Lithium-Ion
cell is connected between the B+ and B- pads. The battery charger/power supply or circuit load is
connected between the B+ and P- pads. The evaluation software can be run in either configuration as long
as a cell is connected between the B+ and B- terminals providing a minimum of 2.5 volts to power the
DS2782. Leaving the PIO pin unconnected does not interfere with the operation of the demonstration
board. Refer to the datasheet for the operation of this pin.
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DS2782EVKIT+
SDA
SDA
SCL
SCL
Figure 2a: Charging Circuit
SOFTWARE INSTALLATION
To install the DS2782 EV kit software, exit all programs currently running and download the latest
version at www.maxim-ic.com. Unzip the compressed file and double click the SETUP.EXE icon to
begin the installation process. Follow the prompts to complete the installation. The DS2782 EV kit
software can be uninstalled in the Add/Remove Programs tool in the Control Panel. After the installation
is complete, open the DS2782K folder and run DS2782K.EXE or select DS2782K from the program
menu. A splash screen containing information about the evaluation kit appears as the program is being
loaded.
SELECTING THE COMMUNICATION PORT
The first time the software runs, the Select Preferences window may appear. In this window, select either
serial or USB communication and the port number; then hit OK. The DS2782 EV kit software saves this
port selection and automatically uses the selection each time the program starts. To change the port later,
click the Preferences option on the menu bar, select Port Settings, and then select the appropriate port. To
attempt to automatically locate the DS9123O, click the Poll Serial Ports button. Warning - automatically
polling for the DS9123O can disrupt other devices connected to your computer’s COM ports.
DS2782EVKIT+ EVALUATION
BOARD
DS2782EVKIT+ EVALUATION
BOARD
B+
+
Power
Supply /
Battery
Charger
B+
+
LOAD
PIO
BATTERY
PIO
BATTERY
B-
-
B-
-
P-
P-
Fig 2b: Discharging Circuit
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DS2782EVKIT+
PROGRAM MENUS
Several pull down menu options have been provided to simplify use of the DS2782 EV kit software for
the user. Their functions are individually detailed below.
FILE MENU
The File Menu allows the user to store and recall information to and from a file directly into the text
boxes on the Parameters Tab. These functions do not directly write or read the DS2782. It is still
necessary for the user to store or recall this information to or from the device by clicking on the Write &
Copy or Recall & Read buttons on the Parameters Tab.
REGISTERS MENU
The Registers Menu gives immediate access to all four status and function registers of the DS2782.
Selecting any of the registers will open an individual control window giving the user a description of each
register bit and the ability to read or write it. See the status register window example.
STATUS REGISTER
The present state of all register bits are displayed immediately upon opening the register window. R/W
locations contain a selection field or command button to allow the user to determine their state. Pressing
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DS2782EVKIT+
the WRITE button will write the new value to the register and read the corresponding register inside the
DS2782 to verify the correct value was written. The Control Register is stored in EEPROM, so when the
WRITE command is issued, the value is written and copied to EEPROM without changing the values of
the remainder of the Parameter EEPROM block.
PREFERENCES MENU
The Preferences Menu allows the user to change COM port settings at any time. Edit Preferences opens
the Select Preferences window. See Selecting the Communication Port above.
HELP MENU
Selecting the About topic from the Help Menu will open a window containing information about the
current revision of this program and Dallas Semiconductor.
PROGRAM TABS
All functions of the program are divided under four tabs in the main program window. Left click on the
appropriate tab to move to the desired function page. Located on the Real Time tab is all of the
information measured and calculated by the DS2782. That data is divided between the Parametric Data
Tab and Fuel Gauging Tab. The Parameters Tab gives the user access to the entire Parameter EEPROM
memory block in terms of Application Units and Device Units. The Memory tab displays the contents of
every register and memory location inside the DS2782 and allows the user to alter the data. The Data
Log tab allows the user to store all real time information to a file and view the data in a graphical form.
REAL TIME TAB
The Real Time data is divided into two tabs: Parametric Data and Fuel Gauge Data. The Parametric Data
Tab contains all of the real time measurements taken by the DS2782. The Fuel Gauge Data contains all
of the values calculated by the DS2782.
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