Operation
Figure 8. EEPROM Screen
The values in the EEPROM can be easily changed using the EVM’s auto programming feature. To use the
auto program feature:
1. Make sure VOUT of the EV2300 is connected to PROG of the EVM.
2. Connect a 21-V supply across 21 V (J3
−
1) and VSS (J3
−
3).
3. Click on the use auto-programming box to enable auto EEPROM programming.
To change the EEPROM values simply click on the value to be changed, enter the new value, and press
enter.
The EEPROM values can be stored in a file on the PC by using the File|Save Gas Gauge Flash
Constants command from the pull down menu. Similarly, a saved file can be load by using the File|Open
Gas Gauge Flash Constants command. Once the file is called up, the Write all EEPROM button can be
used to write all the EEPROM values at once.
NOTE:
Changing EEPROM data affects critical aspects of the bq26500 operation. Please review the
bq26500 data sheet to determine how to develop new data for the EEPROM based on your
application. It is recommend to first save the default EEPROM data as a file first before
changing the data. In this way, the default data programming can easily be restored.
The bq26500 automatically uses the new EEPROM in its calculations, once programmed.
8.2.3
Resetting the bq26500
The bq26500 can be reset at anytime by using the Options|Special Options|Reset bq26500 from the
pulldown menu. When reset, the bq26500 loads the configuration values from EEPROM and set the
remaining capacity registers to zero.
10
bq26500EVM Single-Cell Battery Fuel Gauge Evaluation Module
SLUU174A – March 2006 – Revised October 2013
Copyright © 2006–2013, Texas Instruments Incorporated
