TPS65987DDJ: The issuse with SPI interface.

Ding Darren

Prodigy 40 points

Part Number: TPS65987DDJ

Hi,

We found that our TPS65987DDJ has no SPI communication with flash, and CS# is always high.

The design and pd’s formware are attached, please help check it, ths.65897 design.pdf TPS65987DDJ_firmware.zip

over 4 years ago

0 Hari Patel1 over 4 years ago

TI__Genius 12700 points

Hi Ding,

The SPI port for the PD controller is mainly for the Flash IC. Is this what you have it connected to?

If so, the SPI Flash must first be programmed with a full flash image of the PD controller configurations the first time before the PD controller can pull the configurations upon boot up.

Thank you,

Hari

0 Ding Darren over 3 years ago in reply to Hari Patel1

Prodigy 40 points

SPI connected to 25Q80DV。

We replaced some 65987DDJ have used on other motherborad, and the SPI communication is ok.

Your mean that we need change some registers with PD controller first time？

0 Hari Patel1 over 3 years ago in reply to Ding Darren

TI__Genius 12700 points

Hi Ding,

No that means the SPI configuration may be different on your schematic. For the Flash programming, you will need to program the full-region flash binary image since it will be empty to begin with. However, afterwards, you can program the low region binary only. Are you programming the Flash via EC?

Thank you,

Hari

0 Ding Darren over 3 years ago in reply to Hari Patel1

Prodigy 40 points

1、Programming the flash or PD controller? I means that we using a same flash and replaced PD controller, the SPI back to normal. 2、Can you tell us how to programming the Flash?

0 Hari Patel1 over 3 years ago in reply to Ding Darren

TI__Genius 12700 points

Hi Ding,

If you are using an Host/EC to program the flash, please take a look at the following app note:https://www.ti.com/lit/pdf/slvae21

I would recommend double checking that the schematic is correct for your design by following the datasheets' Typical Application example schematic. I noticed that you are using the DJ version, this is only recommended for TBT devices, is this your application? Also, if you haven't already, you can also see these videos which go over the GUI and etc: https://training.ti.com/how-evaluate-and-configure-our-usb-type-c-pd-controllers

Thank you,

Hari

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TPS65987DDJ: The issuse with SPI interface.