• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 31 subscribers
  • Views 145 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TMS570LC4357: 12v Pins

Dobby
Prodigy 185 points

Part Number: TMS570LC4357

Hi ,
There are 12V pins on the HDK board. Can i configuration like differents voltage or gio pins ? For example sometime 0 voltage sometime 12 voltage.

  • +1
    TI__Guru* 77566 points

    Hi Dobby,

    TMS570LC4357 HDK board works with input 12v, but this 12v is not directly connected to GIO's or microcontroller.

    As shown in below picture the 12v first converted 5v and then the 5V will get converted to 3.3v and 1.2V.

    These 3.3v and 1.2v are connected to microcontroller IO supply and core supply respectively.

    And as mentioned in datasheet the IO supply cannot be less than 3v or more than 3.6v that is the reason we used IO supply as 3.3V. And this IO supply decides the GIO levels.

    And this IO supply decides the logic high voltage on GIO, as mentioned in below picture the minimum output high voltage on IO pin is VCCIO-0.3 that means we will get 3.3-0.3 = 3V.

    So, we will get 3 to 3.3v on the GIO pins of microcontrollers.

    If you need 12v GIO's then you need to place external switch as shown below:

    __
    Thanks & regards,
    Jagadish.

  • 0 in reply to jagadish gundavarapu
    Prodigy 185 points

    Hi Jagadish.

    Thanks for reply. Are there a pin i can use for a output higher than 9 volt ?

  • +1 in reply to Dobby
    TI__Guru* 77566 points

    Hi Dobby,

    jagadish gundavarapu said:
    TMS570LC4357 HDK board works with input 12v, but this 12v is not directly connected to GIO's or microcontroller.

    As mentioned earlier no pin will directly supports 12v or 9v. All pins will operate with 3.3v only. You need to select any of the GPIO and then you need to use external circuits like voltage buffers (level shifters) or MOSFET switches to convert them to high voltages.

    --
    Thanks & regards,
    Jagadish.