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TPS65983EVM: EVM Configuration as PD Source

Manikandan M V
Intellectual 420 points

Part Number: TPS65983EVM

Hi,

We made our board which has TPS65981 PD controller. After bring-up, I have flashed 5V/2A sink application image into the TPS65981 SPI boot memory. To test its compatibility with PD sourcing device, I have tried working TPS65983 EVM as a power source detailed below for your understanding.

1. Flashed a TI reference Downstream Facing Port image with 5V/2A source PDO in EVM.

2. 3.3V power supply is given to VIN_3V3 for TPS65983 operation. A 5V/2A power is provided on PPHV path.

3. TI EVM and our board are connected through Type-C to Type-C cable.

The expected behavior is TI TPS65983 EVM should establish a PD contract with our board and source 5V/2A (from PPHV). However, our boards remain unpowered. We observe that PPHV does not pass through the VBUS on TI EVM itself. I'm not certain whether I'm missing any software configurations or proper hardware setup.

 

Could you please assist us in configuring the TPS65983 EVM as PD sourcing device in detail?

Regards,

Manikandan

  • 0
    TI__Genius 10370 points

    Hi Manikandan,

    Let's see if we can help you resolve this issue. First off, are you trying to build a thunderbolt application?

    I'm going to ask you to try a couple of things:

    1) Could you try to power up both boards with a 19.5-20V laptop charger to see if the issue goes away.

    2) If the above doesn't resolve the issue, try to re-flash the TPS65981 with the original boot code. In order to re-flash the original boot code, click on "Device" ==> "Re-Flash EVM Firmware (Recovery)"

    I hope this helps :-)

  • 0 in reply to Aramis P. Alvarez
    Intellectual 420 points
    Hi Aramis,

    I do not intend to build Thunderbolt device. Actually, my end customer got TPS65983EVM to build a simple USB-C device (no alternate mode functionality). Later design phase we migrated to TPS65981. However, I have TPS65983EVM to work it as PD source and make TPS65981 devices as PD sink.

    Response-1: Powered by 19-20V laptop adapter. PPHV does not pass through the VBUS on EVM.

    Response-2: Actually I'm flashing the app firmware using Total Phase Cheetah SPI Host Adapter which I have posted in another query regarding this procedure.
    e2e.ti.com/.../641337

    Could you please support to debug further here?
  • 0 in reply to Manikandan M V
    TI__Genius 10370 points

    Hi Manikandan,

    Thank you for your answers. We don't recommend using the TPS65983 device for non-thunderbolt products. I recommend to either the TPS65981, '82, or '86. Also, we recommend that you use a FTDI board to flash the firmware, instead of the Total Phase Cheetah SPI Host Adapter. Please follow the TPS6598x Application-Customization Tool User Guide here: http://www.ti.com/lit/ug/slvuar8a/slvuar8a.pdf . The TPS65981EVM should come with a FTDI board with the device, which has a Type-B micro port for easy flashing.Let me know if you're able to flash the firmware using the FTDI board method. 

  • 0 in reply to Aramis P. Alvarez
    Intellectual 420 points

    Hi Aramis,
    Okay, I have ordered the TPS65981EVM for checking this. Post verification would let you know.

    Also, is it possible to flash our TP65981 make boards using TI FTDI board?

    Meantime, I have my custom application project file attached below. Can you please load this project and flash it into TPS65981EVM using TI application customizer tool. Next, readback from SPI flash and share the .BIN file. I can load this .BIN file into TPS65981 flash memory and verify the functionality.

    1070.TPS65981 HD3SS460 UFP Only 20171121.pjt

  • 0 in reply to Manikandan M V
    TI__Genius 10370 points

    Hi Manikandan,

    This is a good question. It's definitely possible to flash the '81 using the TI FTDI board. The EVM board comes together with both the FTDI chip and the '81 device. There's no need to break out the board. Just plug in a micro-B cable to the board and connect to your computer. With the GUI, you can flash the '81 device.

    For your second question, I saw that this was also posted here: https://e2e.ti.com/support/interface/usb/f/1008/t/641337. My colleague should be able to respond soon. Thank you for using TI products for your design :-)