Is there an active Dead Battery Rd in CYPD2134?

Announcements

Live Webinar: USB-C adoption. Simple & Cost-efficient solutions | April 18th @9am or 5pm CEST. Register now !

Tip / Sign in to post questions, reply, level up, and achieve exciting badges. Know more

cross mob
GrCa_1363456
Level 6
Level 6
50 likes received Beta tester First comment on KBA

 

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

0 Likes
1 Solution
ShifangZ_26
Moderator
Moderator
Moderator
10 likes given 250 sign-ins 1000 replies posted

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