usb pd 제거 혹은 통신 실패

GoodCRC 받고 1ms 이내 응답하지 않으면(tReceive) 통신에러로 간주한다는 건가?

 

2.6.1 Source Operation Detach or Communications Failure: o A Source detects plug Detach and takes VBUS down to vSafe5V within tSafe5V and vSafe0V within tSafe0V (i.e. using USB Type-C Detach detection via CC). o When the Source detects the failure to receive a GoodCRC Message in response to a Message within tReceive:  Leads to a Soft Reset, within tSoftReset of the CRCReceiveTimer expiring.  If the soft reset process cannot be completed a Hard Reset will be issued within tHardReset of the CRCReceiveTimer to restore VBUS to USB Default Operation within ~1-1.5s:  When the Source is also the VCONN Source, VCONN will also be power cycled during the Hard Reset. o Receiving no response to further attempts at communication is interpreted by the Source as an error (see Error handling). o Errors during power transitions will automatically lead to a Hard Reset in order to restore power to default levels. 2.6.2 Sink Operation Detach or Communications Failure: o A Sink detects the removal of VBUS and interprets this as the end of the PD Connection:  This is unless the vSafe0V is due to either a Hard Rest, Power Role Swap or Fast Role Swap. o A Sink detects plug removal and discharges VBUS. o When the Sink detects the failure to receive a GoodCRC Message in response to a Message within tReceive:  Leads to a Soft Reset, within tSoftReset of the CRCReceiveTimer expiring.  If the soft reset process cannot be completed a Hard Reset will be issued within tHardReset of the CRCReceiveTimer to restore VBUS to USB Default Operation within ~1-1.5s.  Receiving no response to further attempts at communication is interpreted by the Sink as an error (see Error handling). o Errors during power transitions will automatically lead to a Hard Reset in order to restore power to default levels. tReceive min 0.9 max 1.1 ms tSoftReset max 15 ms tHardReset max 5 ms GoodCRC는 Source / Sink / Cable 에서 다 보낼수 있나 보네.. 먼진 몰라도 재시도 횟수는 최대 2회?