BQ27000EVM Datasheet, PDF (12/19 Pages) Texas Instruments – bq27000 Single Cell Battery Fuel Gauge Evaluation Module

Operation
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Figure 10. EEPROM Screen
The values in the EEPROM can be easily changed using the EVMs 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 BAT- (J2-2)
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 bq27000 operation. Please review
the bq27000 data sheet to determine how to develop new data for the EEPROM based on
your application. It is recommended 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 bq27000 automatically uses the new EEPROM in its calculations once
programmed.
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bq27000 Single Cell Battery Fuel Gauge
Evaluation Module
SLUU157A – September 2004 – Revised November 2004