Hard reset using ccg5

Kok · ‎Jul 27, 2022

Using CCG5 as the sink end, The Apple 20W or other 65W PA charge for ccg5, a hard reset occurs when PA plugin, PD LOG has been posted.

Please help to analyze the reason.

ShifangZ_26 · ‎Jul 27, 2022

Hello Kok,

Typically, Hard reset was issued before sink send request without obvious current sink with below reason:

Sink have not get VBUS was powered 5V and vRd is effective. The max timeout is 275ms (refer tVBUSON in Type-C specification.). Sink will send Hard Reset.
In SPR Mode when a Sink observes an absence of Source_Capabilities Messages, after VBUS is present, for a duration of tTypeCSinkWaitCap (max: 620ms) the Sink Shall issue Hard Reset Signaling in order to restart the sending of Source_Capabilities Messages by the Source. Sink will send Hard Reset.
If Source have sent Source Capabilities than 50 times, but sink have not acked with GOODCRC. Source will send Hard Reset.

Best Regards,

Lisa

ShifangZ_26 · ‎Jul 27, 2022

Hello Kok,

Typically, Hard reset was issued before sink send request without obvious current sink with below reason:

Sink have not get VBUS was powered 5V and vRd is effective. The max timeout is 275ms (refer tVBUSON in Type-C specification.). Sink will send Hard Reset.
In SPR Mode when a Sink observes an absence of Source_Capabilities Messages, after VBUS is present, for a duration of tTypeCSinkWaitCap (max: 620ms) the Sink Shall issue Hard Reset Signaling in order to restart the sending of Source_Capabilities Messages by the Source. Sink will send Hard Reset.
If Source have sent Source Capabilities than 50 times, but sink have not acked with GOODCRC. Source will send Hard Reset.

Best Regards,

Lisa

Kok · ‎Jul 28, 2022

Hi Lisa,

Thank you for your reply, It seems like the sink is delay when response the source capability, I'll modify the code to verify.

Thank you!

Re: Hard reset using ccg5