TUSB2077A: Full-speed support on all ports simultaneously

Damjan Bandic

Part Number: TUSB2077A

Hi,

Can the TUSB2077A hub provide full-speed (12 Mbit/s) communication on all seven downstream ports at the same time (simultaneously)?

Best regards,
Damjan.

over 4 years ago

0 JMMN over 4 years ago

TI__Guru 60870 points

Hello Damjan,

Yes, all downstream ports can connect at FS simultaneously. The traffic is all scheduled and driven by the USB host with the devices responding, the hub does not control that. Please note that the connection between the host and the upstream port of the hub is a single 12 Mbps link.

Regards,

JMMN

0 Damjan Bandic over 4 years ago in reply to JMMN

Prodigy 10 points

Hello JMMN,

I'm a little bit confused with your statement:

JMMN said:
Please note that the connection between the host and the upstream port of the hub is a single 12 Mbps link.

How can I get 12Mbps speed on all 7 ports at the same time when the upstream port can provide only 12Mbps?

Best regards,
Damjan.

+1 Brian Zhou over 4 years ago in reply to Damjan Bandic

TI__Guru*** 145435 points

Damjan:

The traffic is scheduled, only one downstream port is go though upstream at one time.

Regards,

brian

0 JMMN over 4 years ago in reply to Brian Zhou

TI__Guru 60870 points

All downstream devices are connected at USB Full Speed (12 Mbps), but the actual traffic throughput will vary depending on how the host schedules the transfers.

REgards,

JMMN

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TUSB2077A: Full-speed support on all ports simultaneously