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TAC5212: GPIO pull resistors

Bernhard Boehmer
Expert 1310 points

Part Number: TAC5212

Tool/software:

Hello TI,

1. Can TAC5212 have configurable pull resistors if configured as input? If so, what are the pertinent registers, please?

2. Current datasheet slasf23 says:

What is the corresponding specification of R_PU, please?

  • 0
    TI__Mastermind 29210 points

    Hi,

    Correct, if you pull up the GPIO pin we recommend a 20k resistor to IOVDD.

    Regards,

  • 0 in reply to Daveon Douglas
    Expert 1310 points

    Hello TI,

    Thank you for the response, however, the question pertained to the part's internal pull registers or no:

    1. Does the TAC5212 have pull resistors internal to the part on the GPIO pins which are configurable in user mode (pull-up / pull-down / none)?

    2. If it has, what are the pertinent registers to control the pull direction, please?

    3. R_PD (the internal pull-down resistors possibly applicable to the GPIO pins) has a typical value of 20 kΩ, according to the datasheet. What is the corresponding typical value of the pull-up resistor, if there is one, please?

  • +1 in reply to Bernhard Boehmer
    TI__Mastermind 29210 points

    Hi Bernhard,

    The architecture of the GPIO pin is of CMOS logic circuit type. Depending on the user mode of the pin, you may be able to configure the output drive to one of the options shown below. In order to change the state from low to high or vice versa an external pull up/down resistor of 20k to IOVDD is typical.

    GPIO output drive configurability:

  • 0 in reply to Daveon Douglas
    Expert 1310 points

    Sorry, pressed the wrong button. The above did not resolve my issue.

    The question pertains to the use of GPIO pins as *input*:

    1. Does the TAC5212 have pull resistors internal to the part on the GPIO pins *when configured as input* which are configurable in user mode (pull-up / pull-down / none)?

    2. If it has, what are the pertinent registers to control the pull direction, please?

    3. R_PD (the internal pull-down resistors possibly applicable to the GPIO pins) has a typical value of 20 kΩ, according to the datasheet. What is the corresponding typical value of the pull-up resistor, if there is one, please?

  • +1 in reply to Bernhard Boehmer
    TI__Mastermind 29210 points
    Bernhard Boehmer said:
    1. Does the TAC5212 have pull resistors internal to the part on the GPIO pins *when configured as input* which are configurable in user mode (pull-up / pull-down / none)?

    Unfortunately not.

    Bernhard Boehmer said:
    3. R_PD (the internal pull-down resistors possibly applicable to the GPIO pins) has a typical value of 20 kΩ, according to the datasheet. What is the corresponding typical value of the pull-up resistor, if there is one, please?

    Both pull up and pull down are 20k