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USB EZ-PD Type-C

GrCa_1363456
Contributor II

 

Section 8.3 of AN210403, Hardware Design Guidelines for DRP Applications Using EZ-PD USB Type-C Controllers, states:

CCG2 has an integrated termination resistor (Rd) on the CC2 line and a dedicated RD1 resistor pin that needs to be shorted with the CC1 line of CCG2. The dead battery Rd resistors are disabled by the application firmware once the device is powered up. 
CCG2/CCG3/CCG4/CCG5/CCG5C/CCG6/CCG6F /CCG6SF/CCG6DF devices have internal active Rd terminations
that are used after the dead battery Rd resistors are disabled. 

Are the "dead battery Rd resistors" active in a CYPD2134 that is configured as a DFP with only Rp pullups connected?

If so, how long will the Rd resistors pull the CC lines low before firmware disables the "dead battery Rd resistors"?

Greg

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1 Solution
ShifangZ_26
Moderator
Moderator

Hello Greg, 

You could find it from Order Information of CCG2 datasheet.  The CCG2 is not specified separate Rd_DB and Rd from Rd, It shall be support R_DB for all of devices with Rd integrated. To be safe, CYPD2122 is definitely have Rd_DB.   

ShifangZ_26_0-1632634663556.png

Best Regards,

Lisa

View solution in original post

3 Replies
ShifangZ_26
Moderator
Moderator

Hello Greg,

1. Are the "dead battery Rd resistors" active in a CYPD2134 that is configured as a DFP with only Rp pullups connected?

>> CYPD2134 is not integrate  dead battery Rd resistors.

 

Best Regards,

Lisa

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GrCa_1363456
Contributor II

Lisa,

 

Thanks for the quick reply.

Is there a list of which CCG2 parts have the dead battery Rd resistors integrated?

Greg

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ShifangZ_26
Moderator
Moderator

Hello Greg, 

You could find it from Order Information of CCG2 datasheet.  The CCG2 is not specified separate Rd_DB and Rd from Rd, It shall be support R_DB for all of devices with Rd integrated. To be safe, CYPD2122 is definitely have Rd_DB.   

ShifangZ_26_0-1632634663556.png

Best Regards,

Lisa

View solution in original post