Using the Battery Management Studio (bqStudio) tool to configure the BQ34Z100-G1 to HDQ mode, a write to the Control command [0x00] of [0x7C40] is required.
To configure HDQ mode with bqStudio:
- Navigate to the Registers screen. HDQ mode is configured by writing data [0x7C40] to Control command [0x00].
- Click on the Control value field.
- Write 0x7C40 into the text field and click OK. Because the change in communication protocol involves writing a flag for the new protocol to data flash, it takes about 200 ms to complete. During this time, communications are disabled. Once the command takes effect, the bqStudio will no longer communicate with the gauge.
- Close bqStudio. Change communication connections from the gauge to the HDQ port of the EV2400 device (www.ti.com/tool/ev2400 for more information). Run bqStudio. The bqStudio auto-detection only works for devices that operate in I2C mode.
When the BQ34Z100-G1 device is in HDQ mode, it will not be detected.
- Select BQ34Z100-G1 manually. Click OK to all messages that indicate that the device is not detected or not responsive. When the Registers screen starts, it will take a period of time from when bqStudio first tries to communicate with the device in I2C before trying HDQ mode.
Once it is complete, the Registers screen will display data as it had done initially when it was in I2C mode. The refresh is noticeably slower, due to the slow speed of HDQ.
Use the Registers screen only while the BQ34Z100-G1 is in HDQ mode. All other functions will not be supported in Battery Management Studio.