HD3SS3220: About Device Behavior When PORT Pin Pulls Down

Yuta Nishie

Part Number: HD3SS3220

Hi,

1. If the PORT pin is set to pulldown, will it work as DRP?

　The circuit is based on page 30 "8.2.4 Typical Application, UFP Port" of the data sheet.
　I received a report that I was behaving like a DRP with Type_C_State_Machine of the Vendor Info File in the USB compliance test.
　I also received a report that "DUT(Device Under Test) toggles Rp/Rd to assert, and DUT seems to be DRP instead of Sink."

2. I think it works with UFP, is this understanding correct?

Best Regards,

Nishie

over 2 years ago

+1 Brian Zhou over 2 years ago

TI__Guru*** 131275 points

Nishie;

1: no

2: it's UFFP if PORT is PD.

Best

Brian

0 Yuta Nishie over 2 years ago in reply to Brian Zhou

Genius 4165 points

Hi Brian-san,

Thank you for your support.

I understand it's UFP.

In the Vendor Info File for the USB compliance exam, "Type_C_State_Machine," I selected Sink.

https://www.usb.org/document-library/usb-vendor-info-file-generator

But the result was FAILE.
The following content was FAILE, do you know the cause?

---------------------------------

・TD.4.1.2 Unpowered CC Voltage - Testing Upstream Port

-＞All FAILED, CC voltage must be in vOPEN range

・TD.4.3.1 Sink Connect Source - Testing Upstream Port

->"Removing VBUS" : FAILED, PUT must not toggle between Rd/Rp

・TD.4.3.4 Sink Connect Try.SNK DRP - Testing Upstream Port

->"Entering Try.SNK" : FAILED, PUT must constantly advertise Rd

->termination for 150 ms

"Entering TryWait.SRC " : FAILED, PUT must constantly advertise Rd termination for 100 ms

---------------------------------

Best Regards,

Nishie

0 Brian Zhou over 2 years ago in reply to Yuta Nishie

TI__Guru*** 131275 points

Nishie:

did customer use I2C? do you have detailed test report?

best

Brian

0 Yuta Nishie over 2 years ago in reply to Brian Zhou

Genius 4165 points

Hi Brian-san,

I will check with the customer about I2C and test report.

Let me check one more thing.

Have other customers passed the USB compliance test (UFP) for products using HD3SS3220?

Best Regards,

Nishie

0 Brian Zhou over 2 years ago in reply to Yuta Nishie

TI__Guru*** 131275 points

we passed USB compliance for our CC controller.

Best

Brian

0 Yuta Nishie over 2 years ago in reply to Brian Zhou

Genius 4165 points

Hi Brian-san,

Brian Zhou said:
we passed USB compliance for our CC controller.

->Thank you for your reply.

Yuta Nishie said:
I will check with the customer about I2C and test report.

->Customer do not use I2C to connect SDA/OUT1 and SCL/OUT2 pins.
A resistance of 200kOhm is used to pull up to 5 V(VDD5).

Best Regards,

Nishie

0 Brian Zhou over 2 years ago in reply to Yuta Nishie

TI__Guru*** 131275 points

which pin is connected to 5v with 200k?

Best

Brian

0 Yuta Nishie over 2 years ago in reply to Brian Zhou

Genius 4165 points

SDA/OUT1 and SCL/OUT2 pins.

0 Brian Zhou over 2 years ago in reply to Yuta Nishie

TI__Guru*** 131275 points

can you send schematic for review?

When port pin is low, did you see CC pin toggling as well.?

Best

brian

0 Yuta Nishie over 2 years ago in reply to Brian Zhou

Genius 4165 points

Hi Brian-san,

Would it be possible for a customer to email Brian-san directly with detailed compliance test results and schematics?

Best Regards,

Nishie

0 Brian Zhou over 2 years ago in reply to Yuta Nishie

TI__Guru*** 131275 points

sure

0 Yuta Nishie over 2 years ago in reply to Brian Zhou

Genius 4165 points

Hi, Brian-san,

Our customer just sent you an email.

I appreciate your assistance in this matter.

Best Regards,

Nishie

+1 Brian Zhou over 2 years ago in reply to Yuta Nishie

TI__Guru*** 131275 points

ok, let me check.

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HD3SS3220: About Device Behavior When PORT Pin Pulls Down