BQ27410EVM Datasheet, PDF (16/18 Pages) Texas Instruments – bq27410EVM: Single-Cell Impedance Track Technology

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cannot be found.
2. DFI (Data-Flash Image Files) – These are binary images of the fuel gauge data flash with modified
values based on the application. Because of the binary format, it is quick and easy to transfer them to
and from a gauge. Each fuel gauge model and firmware version has a unique read-only .DFI which is
found in the ..\bq_Evaluation_Software\Plugins\Device_Defaults folder of the application. During the
bqEASY™ process, intermediate versions of .DFI files are recorded with current updated data in order
to prevent the possibility of corruption. Then, the final output of the bqEASY™ software is also a .DFI
file which is the 'golden image' that is programmed into each production unit. This output file is placed
in the ..\bq_Evaluation _Software\Plugins\Projects folder.
3. EZY (bqEASY™ Project Files) – These are read-write text files which record header information
regarding a project, answers to the wizard questions, and status regarding the stage of completion (the
red check marks). They are kept in the ..\bq_Evaluation _Software\Plugins\Projects folder.
11.5 Completion Checkmark
As the wizard questions and tasks are completed, completion checkmarks appear in two places – along
the task list on the left and on the category tabs on top. A checkmark on a top tab only appears after all
tasks in the category have been completed. Completion marks are saved in the .EZY project text file.
When a completed or partially completed project file is opened, the user is given the chance to erase the
checkmarks.
11.6 Device Detection
The bqEASY™ program is designed to work with a fuel gauge present and already communicating with
the bqEVSW evaluation software through the EV2300 or EV2400 USB interface. When the evaluation
software is started, it reads the device type and displays it on the upper title block. This information is
used by the bqEASY™ program to select the correct default data-flash image (.DFI) and data-flash
configuration file (.ENCR) for this particular device. To ensure that the device has not changed, the
bqEASY™ software also checks the device type when the bqEASY button is pressed. If the correct files
are not found, first check the TI Web site in the EVM tool folder for the part being used, and download the
latest version of EV software with bqEASY™ support. If that fails to help, contact TI.
1. Setup
As the wizard questions and tasks are completed, completion checkmarks appear in two places –
along the task list on the left and on the category tabs on top. A checkmark on a top tab only appears
after all tasks in the category have been completed. Completion marks are saved in the .EZY project
text file. When a completed or partially completed project file is opened, the user is given the chance to
erase the checkmarks.
2. Configure
A series of eight screens is used to collect information about the battery pack application to enable
automatic configuration of the most critical data-flash parameters.
3. Calibrate
If you wish to proceed with either automatic chemistry selection or golden unit learning cycles, the
Impedance Track™ fuel gauge must be accurately calibrated. The bqEASY™ screens simply ask the
user to use the calibration screen of the bqEVSW for this purpose.
12 Related Documentation from Texas Instruments
To obtain a copy off the following TI documents, call the Texas Instruments Literature Response Center at
[phone] or the Product Information Center (PIC) at [phone]. When ordering, identify this
document by its title and literature number. Updated documents also can be obtained through the TI Web
site at www.ti.com.
1. bq27410, System-Side Impedance Track™ Fuel Gauge data sheet (SLUSAF4)
16
bq27410EVM: Single-Cell Impedance Track™ Technology
SLUU482A – February 2011 – Revised August 2011
Copyright © 2011, Texas Instruments Incorporated
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