HX3 CYUSB3304-BVXC Internal ROM stuck in suspend?

Tip / Sign in to post questions, reply, level up, and achieve exciting badges. Know more

cross mob
bodangly
Level 1
Level 1
First question asked Welcome!

bodangly_0-1637264235012.png

I have the above schematic implemented. I changed the MODE_SEL resistors to put it into internal rom configuration. However, it is stuck with the suspend LED on, even when I try and plug into the US port. I am using USB 2.0 only.

 

Does internal ROM enable the usb 2.0 hub? Any idea based on my implementation why I can't get anything to happen when plugging into the US port?

 

0 Likes
1 Solution
MallikaK_22
Moderator
Moderator
Moderator
50 likes received 750 replies posted 250 solutions authored

Hi,

Kindly go through the HX3 guidelines once and check if everything is being followed.

https://www.cypress.com/file/140751/download 

There is a schematic & layout checklist on Page 22. You may refer to it.

For using HX3 in USB 2.0 only, you can leave SS diff pairs unconnected and only connect USB 2.0 diff pair. No other special points to keep in mind.

Regards,

Mallika

View solution in original post

0 Likes
1 Reply
MallikaK_22
Moderator
Moderator
Moderator
50 likes received 750 replies posted 250 solutions authored

Hi,

Kindly go through the HX3 guidelines once and check if everything is being followed.

https://www.cypress.com/file/140751/download 

There is a schematic & layout checklist on Page 22. You may refer to it.

For using HX3 in USB 2.0 only, you can leave SS diff pairs unconnected and only connect USB 2.0 diff pair. No other special points to keep in mind.

Regards,

Mallika

0 Likes