TPS65982: nHardResetCount of TPS65982

Takashi Onawa

Part Number: TPS65982

Hi Team,

Could you tell me "nHardResetCount" value when TPS65982 acts as Sink?

In other word, How many hard reset does TPS65982 try to send in order to judge that the Source is non-responsive for PD communication?
Regards,

Takashi Onawa

over 8 years ago

0 Eric Beljaars over 8 years ago

TI__Mastermind 36756 points

Hi Onawa-san,

"nHardResetCount" is 2 for the TPS65982 in all cases where multiple hard reset messages are sent. This is also in the USB PD Specification.

Thank you,
Eric

0 Takashi Onawa over 8 years ago in reply to Eric Beljaars

TI__Genius 13200 points

Hi Eric-san,

Thanks for your quick response. I'm sorry. We did not check the contents of the specification sheet.

Sorry, three more questions.
1. Are there any registers to know HardResetCount(how many hard reset occurred) in TPS65982?
2. When is the count cleared?

Regards,
Takashi Oawa

0 Eric Beljaars over 8 years ago in reply to Takashi Onawa

TI__Mastermind 36756 points

Hi Onawa-san,

1. There are no registers that contain the HardResetCount value. However, you could look at the PD Status Register to view the "Hard Reset Details" field. This will give you an indication as to why the Hard Reset occurred.
2. The HardResetCount will only start counting if the connected device does not respond to the Hard Reset PD message within tNoResponse (5.5s max). If the far end device does not respond to the Hard Reset within tNoResponse for the second Hard Reset message. The PD communication will stop until there is a Disconnect and reconnect.

Thank you,
Eric

0 Takashi Onawa over 8 years ago in reply to Eric Beljaars

TI__Genius 13200 points

Hi, Eric-san,

Thanks, I understood.

Regards,
Takashi Onawa

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TPS65982: nHardResetCount of TPS65982