TPS65982: TPs65982 Fw size issue

John Liu59

Part Number: TPS65982

Dear all,

We have an application having two type C ports, one external flash ROM want to use, so want the max size should be chose? is one 128kB flash ROM is enough for the application?

Can the two ports share the same FW code and how to implement it?

Besides, where we can find the latest FW code?

Thanks.

over 7 years ago

0 Eric Beljaars over 7 years ago

TI__Mastermind 36756 points

Hi John,

You can use the Primary 82 to boot the secondary 82 over UART. This is discussed in the TPS65982 datasheet. In this scenario, the 2 TPS65982's can share the same SPI Flash. In this use case, I would recommend at least 256kB memory in the flash.

You can find the latest code in the TPS65982 Tools and Software tab as a part of the Application Customization GUI.

If this answers your question, PLEASE select This resolved my issue

Thank you,

Eric

0 John Liu59 over 7 years ago in reply to Eric Beljaars

TI__Intellectual 2735 points

Hi Eric,

Could you please help explain more why 256kB is required?
Thanks.

0 John Liu59 over 7 years ago in reply to John Liu59

TI__Intellectual 2735 points

Hi Eric,

To be clear, the application has two typc C ports, one for DP+USB3.0, while the other for Charge and USB3.0, for the FW, how much for the external flash should be selected?
Customer want to use 128kB flash, could you please help confirm?

Thanks.

0 Eric Beljaars over 7 years ago in reply to John Liu59

TI__Mastermind 36756 points

Hi John,

The TPS65982 has 2 64kb images in the flash for redundancy. If one of the images is corrupt, it can still boot from the secondary image. The Full flash also has a 4kb header and some extra spacing between the two images. The total full flash image size comes out to be about 136kb. Therefore, a 256kb flash is recommended.

If this answers your question, PLEASE select This resolved my issue

Thank you,

Eric

0 John Liu59 over 7 years ago in reply to Eric Beljaars

TI__Intellectual 2735 points

Hi Eric,

Thanks for your clarification.
As I mentioned before, since the two ports has different function, one need support USB3.0+PD, another support USB3.0+DP, can they share the same frame work? and the frame work should be the full featured, am I right?

Thanks.

0 Eric Beljaars over 7 years ago in reply to John Liu59

TI__Mastermind 36756 points

Hi John,

Yes, they can share the same frame work. The datasheet discusses how two TPS65982s can share the same SPI Flash in section 8.4.8. In that case, the primary 82 is connected to the spi flash and the secondary 82 will download the configuration from the primary 82 over UART.

If this answers your question, PLEASE select This resolved my issue

Thank you,

Eric

0 John Liu59 over 7 years ago in reply to Eric Beljaars

TI__Intellectual 2735 points

Hi Eric,

So for different function of the two type C ports, the frame work is the same?

Thanks.

0 Eric Beljaars over 7 years ago in reply to John Liu59

TI__Mastermind 36756 points

Yes, that's correct.

If this answers your question, PLEASE select This resolved my issue

Thank you,

Eric

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TPS65982: TPs65982 Fw size issue