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USB EZ-PD™ Type-C

nisac_4161771
New Contributor

1. The newest firmware for the CYPD3177 supports a pull-up resistor on FLIP to set the VDO bit in the profile for data or no data. The datasheet neglects to say where the pull-up resistor should pull up to. Is it Vddd?

2. Is there any way to update the firmware in older devices?

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1 Solution
Abhilash_P
Moderator
Moderator

Hi,

 

   Yes, since the application here is sink only, the VDDD of 3.3V is generated. 

 

Since this cannot be programmed and the firmware is fixed, it is recommended to buy the latest chip that has the updated firmware in it.

 

Regards,

Abhilash P

View solution in original post

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6 Replies
Abhilash_P
Moderator
Moderator

Hi,

   The data capability can be determined by using the different resistor values on Flip pin as shown below,

Abhilash_P_0-1630256512891.png

 

The flip pin is internally pulled up to 3.3V. The reference can be seen in the below image,

Abhilash_P_1-1630256595266.png

 

Can you please confirm if you are referring to the CYPD3177 firmware version 4.05?

 

Regards,

Abhilash P

 

 

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nisac_4161771
New Contributor

Ok, so the other end (the end not connected to FLIP) of the selection resistor goes to Vddd then?

yes, I’m talking about v4.05. I have an inventory of devices now and would much prefer the behavior of 4.05 - specifically if I strap it for a Vmin above 5 volts and connect it to a non-PD supply, I want that to be a FAULT condition. Is there any way to field-upgrade these devices?

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Abhilash_P
Moderator
Moderator

Hi,

 

   Yes, since the application here is sink only, the VDDD of 3.3V is generated. 

 

Since this cannot be programmed and the firmware is fixed, it is recommended to buy the latest chip that has the updated firmware in it.

 

Regards,

Abhilash P

View solution in original post

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nisac_4161771
New Contributor

"Buy the latest chip," they say.

Screen Shot 2021-09-04 at 1.03.37 PM.png

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Abhilash_P
Moderator
Moderator

Hi,

 

  Yes, it is recommended to buy the latest chip. 

 

Regards,

Abhilash P

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nisac_4161771
New Contributor

Well,  I guess I'll get back to you in a few years when they're available for purchase again.

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