Hi all,
we plan to use TPS65988DJ on our AMD Celadon FP6 reference design project.
It was mentioned in other threads that "Application Customization Tool" with version 6.2.x is required.
Can you please provide me with a link to the proper "Application Customization Tool"?
Regards
Tomasz
Hi,
thank you for the recommendation.
From what I learned so far, TPS65988DH cannot fulfill project's requirements. Please read my explanation below.
Basically, USB-PD needs to control USB/DP Mux in SoC by sending I2C "crossbar commands".
A "crossbar command" is a I2C write transaction with 2 bytes payload.
AMD requires, that before sending any new command, USB-PD has to check the current status (i.e. if the previous crossbar command was handled).
This check is a I2C read transaction with 3 bytes payload.
The screenshot below presents, how it should look like (status check followed by crossbar command).
In theory, Embedded Controller could instruct USB-PD to trigger the check by using I2Cr [I2C Master Read] command.
Unfortunatelly, I didn't manage to issue I2C read transaction with 3 bytes payload.
On the other side, AMD's reference board is using TPS65988DJ and the firmware F807.12.5x takes care of the status checks on it's own.
That's why I think we need to use TPS65988DJ and not TPS65988DH.
Regards
Tomasz
