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huab_867446
Level 1
Level 1
First reply posted First question asked Welcome!

Dear,

I am not sure if I understand the usage of D+/D- well. In datasheet of the part number CYPD3177-24LQXQ., the D+/D- should be keep open of no connect, while in its EVK the D*/D- are connected to the USB connector. 

Would you please help me and let me know which option is correct? 

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1 Solution
Abhilash_P
Moderator
Moderator
Moderator
50 likes received 500 replies posted 250 solutions authored

Hi,

   The D+ and D- pins on the EVK is connected to support additional protocols for future purposes. 

Please refer to the section 2.3 in the CY4533_EZ-PD Barrel Connector Replacement guide. 

The shot from the section is attached below,

1.PNG

Please let us know if you need any further understanding.

 

Regards,

Abhilash P

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5 Replies
Abhilash_P
Moderator
Moderator
Moderator
50 likes received 500 replies posted 250 solutions authored

Hi,

   The D+ and D- pins on the EVK is connected to support additional protocols for future purposes. 

Please refer to the section 2.3 in the CY4533_EZ-PD Barrel Connector Replacement guide. 

The shot from the section is attached below,

1.PNG

Please let us know if you need any further understanding.

 

Regards,

Abhilash P

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Thanks Abhilash for you reply. 

So, do you recommend to connect them if I design a new board or not? Moreover,  are these pins able to damage the chip or not? 

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Abhilash_P
Moderator
Moderator
Moderator
50 likes received 500 replies posted 250 solutions authored

Hi,

  It is usually not recommended if there are no future plans for supporting additional protocols. 

No, it doesnt damage the chip. They are ESD protected.

 

Regards,

Abhilash P

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We are planning to connect the D+/D- pins to a USB to UART chip (CP2102). Do you recommend to connect these pins through CYPD or neglect this connection? I mean make a direct connection from USB-C connector to the translator chip without make any connection to the CYPD chip.

 

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Abhilash_P
Moderator
Moderator
Moderator
50 likes received 500 replies posted 250 solutions authored

Hi,

  Both the options are recommended.

Regards,

Abhilash P

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