TPS65986: Questions of GPIO event and how to update one region of flash by SPI

Luke Hsieh

Prodigy 110 points

Part Number: TPS65986

Hello,

We have a custom board using TPS65986 to control the input power. (UFP)

And we have two TPS65986 questions would need your help.

1. Does TPS65986 has GPIO event for Sink >5V

We saw TPS65986 has sink voltage event for 12V in application customization tool.

But in our case, we need GPIO event to control the system enable pin due to the input current limitation and system power consumption.

The system only can power up when the input voltage is more than 5V.

May I have your suggestion for this sink >5V event?

2.Could we update just one region by SPI interface?

As I know, there have two regions in the flash memory. And TPS65986 could update one region at one time by I2C interface.

And typically, we using I2C to update FW or using SPI for full flash.

But now our customer wants using SPI to update FW just for one region.

Could we update one region of flash at one time through SPI interface?

If we could do it, is there any document that we could reference?

Thanks

over 7 years ago

0 Atiq Rahman over 7 years ago

TI__Expert 5110 points

Luke,

What are the sink PDOs supported by the system?

Regards,
Atiq

0 Luke Hsieh over 7 years ago in reply to Atiq Rahman

TI__Prodigy 110 points

Hi Atiq,

The sink PDOs are 5V/3A, 9V/3A and 12V/3A.

Regards,

Luke

0 Rahul Sharma16 over 7 years ago in reply to Luke Hsieh

TI__Expert 6430 points

Hi Luke,

Answer to your questions are as follows:
1. There's no direct way to know about negotiated PDO in Sink mode. The all you can do is query TPS65986 over its I2C interface to know about the negotiated PDO and then take required actions.
2. None of our tools supports update of single region over SPI and there's no dcument which talks about it.

Thanks,
Rahul

0 Luke Hsieh over 7 years ago in reply to Rahul Sharma16

TI__Prodigy 110 points

Hi Rahul,

Thanks for your reply.

1. But It has Sink >12V event in mapped event. Could we create a 5V event just like that?
And in our customer design, The system will power up when TPS65986 porvide enough powe.
So, it has no I2C interface before TPS65986 negotiated 9V/12V PDO.
Is there has any solution to indicate the sink voltage in UFP ?

2.Got it.
But I am confused why there are so much difference between SPI and I2C.
SPI interface should also can do the same work, right?

Regards,
Luke

0 Rahul Sharma16 over 7 years ago in reply to Luke Hsieh

TI__Expert 6430 points

Hi Luke,

Let me check internally about both the questions and get back to you.

Thanks,
Rahul

0 Rahul Sharma16 over 7 years ago in reply to Rahul Sharma16

TI__Expert 6430 points

Hi Luke,

I am closing the post as this case has alrady been worked out.

Feel free to reopen this case if you need any help.

Thanks,
Rahul

0 Luke Hsieh over 7 years ago in reply to Rahul Sharma16

TI__Prodigy 110 points

Hi Rahul,

Thanks for your help.

Interface

Interface forum

TPS65986: Questions of GPIO event and how to update one region of flash by SPI