SLVUBT8B November   2020  – June 2022 LP8764-Q1 , TPS6594-Q1


  1.   Scalable PMIC's GUI User’s Guide
  2.   Trademarks
  3. Introduction
  4. Supported Features
  5. Revisions
  6. Overview
  7. Getting Started
    1. 5.1 Finding the GUI
    2. 5.2 Downloading the Required Software
    3. 5.3 Launching the GUI
    4. 5.4 Connecting to a PMIC
  8. Quick-start Page
    1. 6.1 Device Scan Results
    2. 6.2 Configuration and Monitoring
      1. 6.2.1 System Info
      2. 6.2.2 BUCK
      3. 6.2.3 LDO
      4. 6.2.4 GPIO
      5. 6.2.5 Interrupts
      6. 6.2.6 Miscellaneous Settings
      7. 6.2.7 Advanced
  9. Register Map Page
  10. NVM Configuration Page
    1. 8.1 Creating a Custom Configuration
      1. 8.1.1 Static Configuration
      2. 8.1.2 Pre-Configurable Mission States (PFSM)
        1. Creating a State Diagram
        2. Global Settings
        3. Power Sequence
          1. Power Sequence Resources and Commands
          2. Sub-sequences
          3. Power Sequence Editing Tools
        4. Trigger Settings
        5. Trigger Priority List
        6. PFSM Validation
    2. 8.2 Program
      1. 8.2.1 Program an Existing NVM Configuration
      2. 8.2.2 NVM Configuration Special Use Case: Changing the Communication Interface
      3. 8.2.3 Lock Option During NVM Programming
  11. NVM Validation Page
  12. 10Watchdog Page
  13. 11Additional Resources
  14. 12Appendix A: Troubleshooting
    1. 12.1 Hardware Platform Not Recognized
    2. 12.2 PMIC Device Not Found
    3. 12.3 I2C2 is configured but not connected
  15. 13Appendix B: Advanced Topics
    1. 13.1 Scripting Window
  16. 14Appendix C: Known Limitations
  17. 15Appendix D: Migration Topics
    1. 15.1 Migrating from LP8764-Q1 PG1.0 to PG2.0
    2. 15.2 Update the PFSM to Include the PFSM_START State
    3. 15.3 Update Timing Delays
    4. 15.4 Update Trigger Priority and Settings
  18. 16Revision History

Watchdog Page

The Watchdog page is an interactive evaluation tool for exercising the watchdog functionality in both TRIGGER and Q&A modes. This tool uses the MSP432E microcontroller on the AEVM to create the watchdog stimulus for both correct and incorrect use cases. Status monitoring is provided to show the PMIC response.

GUID-20200819-CA0I-S60W-BLBN-8KBVQVGK52QL-low.png Figure 10-1 Watchdog Page

To exercise the watchdog module please make sure the following conditions are met in the PMIC:

  1. The device supports the watchdog feature
  2. The PMIC is in a mission state. A hardware state, like SAFE RECOVERY, will prevent the watchdog from operating.
  3. NRSTOUT (found in the register MISC_CTRL) must be 1
  4. WD_EN (register WD_THR_CFG) must be 1
  5. If applicable to the device, any GPIO configured as DISABLE_WDOG should be logic low
  6. WD_PWRHOLD must be 0
  7. For evaluation purposes it is recommended to set WD_RST_EN to 0 so that the device does not enter WARM RESET during the evaluation.

Trigger Mode

The watchdog page will reflect the settings in the controls section. To change from QA to TRIGGER mode, the Edit/Enable indicator, as highlighted in yellow in Figure 10-1, should be switched to Enable. Once in the trigger mode, switch back to Edit, and adjust the default Window-1 and Window-2 values to a time frame that does not exceed the limits of the AEVM.

With valid timing windows, the watchdog can be re-enabled and the watchdog sequence started.

Start Sequence:

  1. Enable the watchdog, select Enable
  2. Select the mode, TRIGGER or Q&A
  3. Edit the AEVM trigger waveform, select Edit
  4. Adjust Window-1 and Window-2
  5. Select the Sequence Configuration
  6. Enable the watchdog, select Enable

In the EVENT STATUS view, the WD FIRST OK is illuminated and green, see Figure 10-2, indicating that the first watchdog trigger sequence was received correctly. The PMIC is continuously polled during operation and the ERROR STATUS view is updated.

GUID-20200819-CA0I-ZKN7-DMVW-BJHKG9T8QLDG-low.png Figure 10-2 Watchdog Trigger Mode

To stop the evaluation, first use the control to set the RETURN TO LONGWINDOW, second switch from Enable to Edit mode, and then click STOP SEQUENCE.

Stop Sequence:

  2. Select Edit

The sequence configuration can be modified to intentionally provide an incorrect sequence, using the drop-down menu Sequence Configuration. The incorrect timing and the consequent bad event is shown in Figure 10-3. To evaluate this configuration, first, switch from Edit to Enable mode, second, disable the RETURN TO LONGWINDOW, and then click START SEQUENCE.

GUID-20200819-CA0I-MNW8-JV24-BTRX07472879-low.png Figure 10-3 Invalid Trigger Watchdog Input

The errors can be cleared using the icons to the right of each error, or by clicking Clear All.

Q&A Mode

As previously stated, the Q&A mode can be selected when the Edit/Enable indicator is moved to Enable.

GUID-20200819-CA0I-Q3X8-PDPM-7VMRX2FDVND7-low.png Figure 10-4 Watchdog Q&A

Once the Window configuration is updated for the Q&A a similar process can be employed to evaluate the Q&A mode. Figure 10-5 shows a correct sequence of answers to the questions while Figure 10-6 shows an incorrect answer.

GUID-20200819-CA0I-6S3P-ZGFK-7PR2ZSC3SF1W-low.png Figure 10-5 Watchdog Q&A Valid Response
GUID-20200819-CA0I-8KZB-K9NZ-RQCS10MG7BMC-low.png Figure 10-6 Watchdog Q&A Invalid Response