TPS65982: Using the TPS65982 without Type-C Alternate Mode: USB2.0 forwarding with no billboarding

Mehdi Laaboudi

Part Number: TPS65982

Hello,

We plan on using the TPS65982 for PD negociation only. We do not plan on using the Type-C Alternate Mode feature. We therefore want the TPS65982 to forward the USB2.0 data line to an embedded USB controller. We tried to disable the billboarding feature and to enable the RP paths while disabling the EP paths, but this didn't work out in our tests.

Could you give us more information about what you call RP and EP paths in the System Configuration Register? We thought of it as being the configuration of the 2nd-stage multiplexer of the TPS65982 device, is that right? If yes, what does it mean to have both the EP and RP paths enabled? Anyone knows how to configure the chip to achieve what I just described?

Thank you!

over 8 years ago

0 Eric Beljaars over 8 years ago

TI__Mastermind 36756 points

Hi Mehdi,

When USB RP is enabled, the high-speed USB 2.0 path of the TPS65982 is activated as a through-path (RP). When USB EP is enabled, the high-speed USB2.0 path of the TPS65982 is connect as a direct path to the USB2.0 low-speed endpoint (EP).

Thank you,
Eric

0 Mehdi Laaboudi over 8 years ago in reply to Eric Beljaars

Prodigy 80 points

Hi Eric,

Thanks for your answer ! We appreciate it.

So, do you know what it means to enable both the RP and EP paths?

This is basically what we tried. Is there any other configurations that might interfere?

Thanks!

0 Eric Beljaars over 8 years ago in reply to Mehdi Laaboudi

TI__Mastermind 36756 points

Hi Mehdi,

We have tested the TPS65982 with both USB EP and USB RP enabled. There is no interference between these two settings and both can be used simultaneously.

Thank you,
Eric

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TPS65982: Using the TPS65982 without Type-C Alternate Mode: USB2.0 forwarding with no billboarding