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TPS65987D:Please tell me the correct pin info.

user1866475
Intellectual 350 points
Part Number: TPS65987D
Other Parts Discussed in Thread: TPS65987, TPS65988

Hi all,

In TPS65987 SLVSES1D – MAY 2018 – REVISED OCTOBER 2022 datasheet(Rev.D),

See the following pins at "5 Pin Configuration and Functions" Figure5-1,

45.C2_CC1

46.PP2_CABLE

47.C2_CC2

54.C2_USB_P(GPIO20)

55.C2_USB_N(GPIO21)

These pin names are not explained anywhere in the datasheet.

Only these pins are described in the table5-1 as follows.

Can pin45,46,47 be connected to GND? And is pin54,55 good for Float?

It may not be correct to refer to an older version, but the Rev.C is below.

#45,46,47,54,55 pin description matches table5-1.

But look at pins 36 and 37. The SPI's PICO and POCI are the opposite of Rev.D.

My design has stopped. Please hurry up and let me know correct information.

Best Regards,

Yukio Oyama

  • +1
    TI__Mastermind 34736 points

    Hi Oyama-san,

    Pins 45, 46, and 47 are used for TPS65988, which has the same pinouts but is the dual port version of the TPS65987. On the TPS65987, those pins are unused and can be grounded as stated in the Table 5-1 Pin Functions. GPIO 20 and 21 (pins 54 and 55) can still be used, ignore the C2_USB_P/N labels as those are only for TPS65988 (Dual Port version). 

    Pins 36 and 37 are flipped from the previous version of the datasheet due to a mistake, this has been addressed in fixed in this version (Updated October 2022) of the datasheet. 

    To clarify, pin 36 is SPI_POCI (GPIO 8) and pin 37 is SPI_PICO (GPIO 9). 

    Pins 45, 46, and 47 should be GND. 

    Pins 54 and 55 are just regular GPIOs.

    Apologies for the confusion, we're working on fixing the datasheet to reflect these changes. 

    Thanks and Regards,

    Raymond Lin

  • 0 in reply to Raymond Lin
    Intellectual 350 points

    Hello Raymond-san,

    Thanks for the quick reply.
    I will follow your answer and proceed with the circuit design. Thank you.

    Best Regards,

    Yukio Oyama

  • +1 in reply to user1866475
    TI__Mastermind 34736 points

    Hi Oyama-san,

    No problem, closing this thread. If you need further support, please open a new thread so we have better tracking!

    Thanks and Regards,
    Raymond Lin