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USB EZ-PD Type-C

IsFe_3819901
New Contributor

I created a design using the CYPD3125-40LQXIT. I plugged it into my computer, but I do not see the chip. I know it comes with an I2C bootloader. Are there any drivers I need to install to see it on my computer? Or is there any other way to communicate to it? Thanks!

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1 Solution
YiZ_31
Moderator
Moderator

Hi,

I have confirmed that it is now impossible to change bootloader for CYPD3125. In this case, you cannot update it firmware through USB-C port. You'll need an external USB Serial Device like CYPD65211 to update firmware through I2C interface.

Regards,
Eddie

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5 Replies
YiZ_31
Moderator
Moderator

Hi,

For CYPD3120 or CYPD3121, it comes with a USB bootloader. If you plug them into the USB port of your PC, you can see the device.

But for CYPD3125, you'll need to update its firmware through I2C port. You could also update its firmware through SWD interface with a MiniProg.

Regards,
Eddie

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IsFe_3819901
New Contributor

Hi,

In the reference design I have it connected to a USB-C port. Will the MiniProg be able to communicate with it? If so, which one would you recommend I get for this?

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YiZ_31
Moderator
Moderator

Hi,

I have confirmed that it is now impossible to change bootloader for CYPD3125. In this case, you cannot update it firmware through USB-C port. You'll need an external USB Serial Device like CYPD65211 to update firmware through I2C interface.

Regards,
Eddie

View solution in original post

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IsFe_3819901
New Contributor

Hi,

The pins I need to breakout so I can reprogram the CYPD3125-40LQXIT with a MiniProg 3/4 are: VSYS, SWD_0_DAT, SWD_0_CLK, XRES and GND? Is this correct or are there other pins I need as well?

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YiZ_31
Moderator
Moderator

Hi,

You can power CCG3 via VDDD. VDDD, SWD_0_DAT, SWD_0_CLK, XRES and GND, 5 pins are needed.

Regards,
Eddie

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