Reading EMCA data with CCG3PA + CMG1

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JoLu_3455101
Level 4
Level 4
5 likes given 5 solutions authored 25 replies posted

Hi Cypress community,

We have a host CCG3PA PD controller (DFP) connected to a second (UFP) PD controller via a USB-C cable with an embedded  EMCA chip (CMG1). Normally, when the CCG3PA is plugged into the UFP PD controller with this cable, CCG3PA can read the data from the EMCA (CMG1) chip, as well as communicate with the UFP PD controller over CC wire.

However, if CCG3PA is plugged into the CMG1 EMCA cable only (so no UFP device connected on the other side), is it possible that CCG3PA can read the data from the CMG1 EMCA chip without an UFP present? I tried this setup with the Cypress PD Analyzer, but I didn’t see any CC packet exchanged.

 

Thanks,
Jonathan

 

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