TUSB2036: Transfer speed is very slow

naokitakatani

Prodigy 90 points

Part Number: TUSB2036

I made a USB hub, and succeeded recognize USB memory.

However, the hub transfer speed is less than 1MB/s both read and write.

How Can I speed up this hub?

This is the hub schematic.

I think the USB memory I used for testing has enough spec.

Here is a speed of the USB memory.

over 3 years ago

0 JMMN over 3 years ago

TI__Guru 60865 points

Hello,

The TUSB2036 is a 12 Mbps USB full-speed hub, not a 480 Mbps USB high-speed hub. If you place the USB full speed hub between the USB high speed host and the USB high speed memory, the data rate will drop to USB full speed.

Regards,

JMMN

0 naokitakatani over 3 years ago in reply to JMMN

Prodigy 90 points

I understood it impossible high-speed transfer by using USB full-speed hub.

May I ask do you know a chip for USB high-speed hub with 4 downstream(and also the hub with 3 downstream)?

It would help me if typical application is in datasheet.

Thank you.

0 JMMN over 3 years ago in reply to naokitakatani

TI__Guru 60865 points

I would recommend the TUSB4041. There is an EVM users guide with a schematic for this design available on the ti.com page. If you have questions you can request a schematic review on E2E as well.

Regards,

JMMN

0 naokitakatani over 3 years ago in reply to JMMN

Prodigy 90 points

Thank you for your recommend. That is exactly what I want. I'll try to make schematic with TUSB4041.

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TUSB2036: Transfer speed is very slow