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MCT8329A: MCT8329A GUI configuration

Conor
Guru 12065 points
Part Number: MCT8329A
Other Parts Discussed in Thread: MCT8329EVM,

Hi, 

Q1
In the MCT8329EVM GUI, there is a setting of LDO=5.0V as shown in the image below. As far as I can see in the datasheet, the LDO is 3.3V and I can't find the SEL_LDO_5V register itself.
Is it possible to set LDO=5.0V with MCT8329A?

Q2
I would like to know the contents and settings of Analog_Trim in the image below on the MCT8329EVM GUI. I couldn't find a detailed explanation in the datasheet.

Q3
The WEB version "MCT8329A-GUI — GUI for the MCT8329EVM" is unstable and often disconnects. Are there any countermeasures? Also, when will the standalone version (Windows application) be distributed?

Q4
Tool configuration save files are handled as JSON files. Is there a tool or method to convert this JSON file to Excel or TEXT base?

Thanks,

  • 0
    TI__Genius 9220 points

    Hi Eevee,

    • Q1: The SEL_LDO_5V bit is supposed to be reserved as shown in the datasheet, and this is a mistake in the GUI's register map config. Setting this bit in the GUI will not have any effect on the 3.3V LDO output. We will update the GUI and publish a newer version with the bitfield and widget removed.
    • Q2: The Analog_Trim registers are internal trim registers programmed in factory that are not exposed to users. Please note that these registers are also not writable by the user even through the GUI. The GUI will also be updated such that these registers will be read-only in the register map view.
    • Q3: What kind of connection error are you encountering and could you please post a screenshot? Are you able to read the value of any registers or does the GUI always throw the connection error as soon as you try to read/write to any register?

      The offline/standalone version of the GUI is available from the TI Gallery. Simply search for MCT8329 in the TI Gallery, find the latest version, hover over the download icon and choose the platform to download.
    • Q4:We don't provide a tool to convert the register json file to excel. However, you can always use an online JSON to CSV/Excel conversion tool such as this one to do the job: https://data.page/json/csv

    Regards,
    Eric C.

  • 0 in reply to Eric Chen
    Guru 12065 points

    Hi, Eric C

    Eric Chen said:
    The SEL_LDO_5V bit is supposed to be reserved as shown in the datasheet, and this is a mistake in the GUI's register map config.

    I didn't understand this sentence. As far as I can see in the datasheet, there is no "SEL_LDO_5V" register.

    Which block diagram does this 5V or 3.3V LDO show?

    Thanks,

  • 0 in reply to Conor
    TI__Genius 9220 points

    Hi Conor,

    Apologies for the confusion. The SEL_LDO_5V bit being reserved means that it won't show up in the datasheet. It was a legacy bit that got mistakenly included in the GUI during development.

    The MCT8329A only has a fixed 3.3V AVDD LDO Regulator and a fixed 1.5V DVDD LDO Regulator.

    3.3V AVDD is directly sourced from PVDD, and cannot be selected to a different voltage.

    1.5V DVDD is sourced from the VREG input pin, which has 3 connection options:

    • AVDD powered VREG
    • External 3V ~ 5.5V supply for VREG
    • External MOSFET for VREG

    Please refer to the datasheet section 7.3.4 for more details.

    Regards,
    Eric C.