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The byte communication tool is useful to read or write a register. It is present with all views.
4.4.3 Menu Commands
The Help > About menu selection displays version information about the program. Other selections may
provide additional help or links to documentation.
The Options > Verify Writes selection allows selection of a readback of the registers once they are written.
The View menu allows selection of the center window display. Options are the Registers, I2C Pro, or
Sequence views. Views can also be selected with buttons on the left side of the window.
The File menu allows exit of the program.
4.4.4 Registers View
The registers view is shown in Figure 4 and is the default display in the middle of the window when the
software is started. It shows the control, status and data register values. If another view is displayed it can
be selected using the
Registers button on the left side of the window or from the menu.
Figure 4. Registers View
The Read Device button at the top of the Registers view provides important setup of the
bq76940/bq76930/bq76920 software and the IC. The software reads the factory gain and offset data from
the device and populates these in the
Stack V/T/I section for use in calculating display values. The
software writes the CC_CFG register to its proper value and also detects the CRC mode of the device and
sets the software appropriately.
The control registers are shown in the center of the display in the All Read/Write Registers section. Bits
are color coded as described in the section. Bits may be changed by clicking on the bit and selecting the
Commit button in the Change value pop-up window. The default for the pop up window is to change the
polarity of the bit. Since clearing status bits requires a write of 1, the Set bit high needs to be checked in
the Change value pop-up window when clearing status register bits. A bit value change is displayed if the
Options menu Verify Writes is selected.
14 bq76930 and bq76940 Evaluation Module User's Guide SLVU925B – April 2014 – Revised July 2014
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