Texas Instruments INA226 Evaluation Module INA226EVM INA226EVM Datenbogen
Produktcode
INA226EVM
INA226EVM Software Overview
5.2.5
Configuring the Alert Pin
The Alert Pin from the INA226 allows the user to set limits that monitor the registers and trigger a flag
when they are exceeded. The register that is being monitored can be changed by selecting the desired
alert configuration as shown in
when they are exceeded. The register that is being monitored can be changed by selecting the desired
alert configuration as shown in
. The value that is being considered is compared to the Alert
Limit box. This Alert Limit box modifies its functionality based on the selected configuration. It is important
to note that by default, the INA226 Alert pin is set to active low.
to note that by default, the INA226 Alert pin is set to active low.
Figure 21. Configuring the Alert Pin
In addition to the INA226EVM software alert configuration, the Alert Configuration box includes the
Conversion Ready button that allows for a special functionality on the Alert pin. When the INA226
completes the conversions for its current operation, it triggers the Alert pin and notifies the user that
another conversion can be performed. In most cases, the INA226 conversion ready flag is not visible
because of the speed of the INA226 conversion process.
Conversion Ready button that allows for a special functionality on the Alert pin. When the INA226
completes the conversions for its current operation, it triggers the Alert pin and notifies the user that
another conversion can be performed. In most cases, the INA226 conversion ready flag is not visible
because of the speed of the INA226 conversion process.
5.3
Using the INA226EVM Software
After configuring the INA226EVM software, the rest of the tabs can be evaluated. This section describes
the basic operation of the device, and offers guidelines for interpreting the graphic user interface (GUI).
the basic operation of the device, and offers guidelines for interpreting the graphic user interface (GUI).
5.3.1
INA226 Bus Voltage, Shunt Voltage, Current, and Power Reading Bar
The bottom bar of the INA226 software, as shown in
, allows the user to constantly check the
status of the INA226 unit itself. These values are updated each time the Read All Reg button is pressed
at the top of the software. In addition to the register values stored in the part, the software also includes
flags for when the part is ready to trigger another conversion and when the Alert pin is triggered.
at the top of the software. In addition to the register values stored in the part, the software also includes
flags for when the part is ready to trigger another conversion and when the Alert pin is triggered.
Figure 22. INA226 Results Bar
18
INA226EVM Evaluation Board and Software Tutorial
SBOU113
–
June 2011
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2011, Texas Instruments Incorporated