Texas Instruments bq34z100, User Manual, Page: 14 / 27

Battery Management Studio
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3.8 Send HDQ Screen
When using the HDQ single wire serial communication feature, the mode of the gauge must be changed
with a special command. This screen provides a button for this purpose. Note the warning message. The
process is not reversible. Once in HDQ mode, the HDQ pro screen is available for testing commands and
reprogramming the device. For register scanning and data flash access, use the companion evaluation
program for HDQ (see
Figure 9 ).
Figure 9. Send HDQ Screen
• To the HDQ communications port (HDQ, GND)
– Attach the Communications Interface Adapter cable to the J7 terminal block (I2C Interface) to the
I2C port on the EV2300..
– Press the Convert From I2C to HDQ button
– Power cycle the voltage to the device
– Attach the Communications Interface Adapter cable to the J4 terminal block (HDQ Interface) to the
HDQ port on the EV2300
– Select File | Restart to reload the bqStudio program
WARNING
The conversion to HDQ mode is permanent. TI recommends using
the I2C interface to setup, calibrate, and run the optimization cycle.
14 bq34z100EVM Wide Range Impedance Track™ Enabled Battery Fuel Gauge SLUU904A – April 2012 – Revised February 2015
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