Interface Adapter
8
SLVU924D – March 2014 – Revised November 2018
Copyright © 2014–2018, Texas Instruments Incorporated
bq76920 Evaluation Module User's Guide
3
Interface Adapter
The bq76940/bq76930/bq76920 evaluation software and bqStudio software support either the TI EV2400
or EV2300 interface board to provide communication with the EVM board from the computer. The EV2400
is the recommended interface and uses operating system drivers so no separate installation is required.
Drivers must be installed for the EV2300 and may not be available for newer operating systems. Do not
connect the EV2300 interface board to the computer until after the drivers are installed.
To use the EV2400 to program the bq78350, its firmware must be updated to version 0.18 or newer. The
firmware version of the EV2400 may be observed in the bqStudio dashboard, see
. Find the
latest EV2400 Firmware Updater in the tool folder
.
If you have used an EV2300 with your computer previously, no additional installation is required. EV2300
drivers are included in the bq76940 software installation package and are found in the installation directory
after installing the software, typically at c:\Program Files (x86)\Texas Instruments\bq76940. Alternatively or
for the bqStudio software, drivers are found at
http://e2e.ti.com/support/power_management/battery_management/m/videos__files/458983.aspx
or
. Install the drivers by following these steps:
1. Navigate to the directory with the drivers.
2. Run the file
EV2300....exe
file
4
bq76940/bq76930/bq76920 Software
This section describes how to install and use the bq76940/bq76930/bq76920 software for the EVM. This
software is used when evaluating the AFE alone without the gauge. For evaluation with the bq78350
gauge, refer to
The bq76940/bq76930/bq76920 software supports the bq76920 AFE I
2
C communication. This software is
intended to demonstrate register control and operation of the bq769x0 family of AFEs in the absence of a
gauge or MCU. This software is not intended to operate on a bus with another master. The AFE does not
turn on the protection FETs without control, the bq76940/bq76930/bq76920 software provides that control
from the GUI.
The software may also be identified as bq76940 or bq769X0 in menus or windows as space permits.
4.1
System Requirements
The bq76940/bq76930/bq76920 software requires a Windows 7, or later operating system. The computer
must also have Microsoft
®
.NET connection software version 4.0, or higher, installed. The examples in this
document are from Windows 7.
4.2
Installing the bq76940/bq76930/bq76920 Software
Find the latest software version in the software section of the EVM tool folder
http://www.ti.com/tool/bq76920EVM
or search from
. Check periodically for software updates.
Use the following steps to install the bq76940/bq76930/bq76920 software:
1. Copy the archive file to a directory of your choice, extract all files and run the setup.exe application.
2. Follow the instructions and make selections as required on the setup windows selecting
Next
, as
required. TI recommends installing the software in the default location.
3. On the last window, select
Close
to complete the bq76940/bq76930/bq76920 software installation.
4.3
Interface Adapter
The interface adapter I2C connector should be connected to the I2C connector for use with the bq76940
software. Board pull-up shunts must be installed for the EV2300 and removed for the EV2400. The
interface adapter should not be connected to the I2C connector if a gauge or MCU is connected to the
bus.