Regarding USB data speed with BC1.2 supported by CYUSB3314.

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YuMa_1534086
Level 7
Level 7
Distributor - Macnica (Japan)
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Hello.

At charging by using BC v1.2, does CYUSB3314 support data speed of both USB 3.0 and USB2.0?

Or does CYUSB3314 support only USB 3.0 speed at the timing of charging by BC1.2?

I think that BC1.2 has 3 charging mode(DCP, SDP, CDP).

Does CYUSB3314 support all BC1.2 charging mode at USB3.0 and USB2.0 speed?

Can not CYUSB3314 support USB2.0 at BC1.2 charging?

Because D+/D- port becomes pull-up, pull-down or short at BC1.2 charging.

Best Regards.

Yutaka Matsubara

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1 Solution
HirotakaT_91
Moderator
Moderator
Moderator
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Hi,

USB BC 1.2 (CDP, SDP) can support both USB 2.0 and USB 3.0 communication.

DCP mode does not enumerate a device. That is, there is no USB communication.

AN92554 - Implementing Battery Charging Features using HX3 is very helpful to understand USB BC 1.2.

http://www.cypress.com/documentation/application-notes/an92554-implementing-battery-charging-feature...

Best regards,

Hirotaka Takayama

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3 Replies
HirotakaT_91
Moderator
Moderator
Moderator
500 replies posted 250 replies posted 100 replies posted

Hi,

USB BC 1.2 (CDP, SDP) can support both USB 2.0 and USB 3.0 communication.

DCP mode does not enumerate a device. That is, there is no USB communication.

AN92554 - Implementing Battery Charging Features using HX3 is very helpful to understand USB BC 1.2.

http://www.cypress.com/documentation/application-notes/an92554-implementing-battery-charging-feature...

Best regards,

Hirotaka Takayama

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YuMa_1534086
Level 7
Level 7
Distributor - Macnica (Japan)
500 replies posted 250 sign-ins 10 likes received

Dear Takayama-san.

Thank you for your reply.

I have one question to make sure.

CYUSB3314 supports DCP mode itself.

In this time, CYUSB3314 has only charging function without USB2.0/3.0 communication.

Is my understanding correct?

I apologize for bothering you…

Best Regards.

Yutaka Matsubara

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Hi,

Yes. If CYUSB3314 works on DCP mode, there is no support USB 2.0/3.0 communication.

It is USB BC specification. You can refer to on page 3, AN92554.

Best regards,

Hirotaka Takayama

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