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Quick-Start Demonstration

Table 13. Test Points (continued)

Label Ground Reference Test Point

TP13 ALERT

TP14 VIOUT

TP15 VCOUT

TP16 VTB

TP17 VREF

TP18 SDA

TP19 SCL

TP20 V3P3

TP21 BATT+

TP22 PACK–

TP23 P2.5 ON MSP430

TP24 P3.7 ON MSP430

TP25 P3.5 ON MSP430

TP26 P3.4 ON MSP430

TP27 P3.0 ON MSP430

TP28 VSS

TP29 VSS

2.5 bq76925

The bq76925 application circuit provided allows for complete evaluation of the device performance with 3-,

4-, 5-, or 6-cell battery packs. Cell voltages, battery current, and temperature can be monitored.

Monitoring is possible with the firmware that is preloaded into the MSP430 microcontroller and with the

bq76925 Evaluation Software provided. Alternatively, the user can develop a custom system if desired.

2.6 MSP430F2122

The MSP430F2122 application circuit is provided to read the analog signals from the bq76925 and make

them available for reading over the I2C bus by the bq76925 Evaluation Software. The MSP430 circuitry is

designed to allow the user to create custom firmware if desired.

3 Quick-Start Demonstration

This section demonstrates the measurement system of the bq76925 using the onboard cell simulator.

To quickly get the bq76925EVM up and running, follow the instructions in this section. The following

equipment and software are required:

• bq76925EVM Evaluation Module

• A 24-Vdc power supply

• Power supply capable of up to 100 mV and at least 100 mA of drive capability.

• PC with MS Windows operating system

• bq76925 Evaluation Software

• USB-TO-GPIO Adapter

3.1 Evaluation Software and USB-TO-GPIO Adapter

The bq76925 Evaluation Software and the USB-TO-GPIO Adapter must be installed and set up.

The USB-TO-GPIO Adapter is an EVM that is sold separately from the bq76925EVM. The firmware in it

must be changed to work with the bq76925 because this EVM was developed for generic applications. Go

to the TI Web site to download the firmware loader.

http://focus.ti.com/docs/toolsw/folders/print/usb2gpio-loader-sw.html

SLUU514–July 2011 bq76925EVM Evaluation Module

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