TUSB2077A: how to configure TUSB2077 POWERON pin?

Chang Cao

Part Number:

We will use TUSB2077 to design an USB HUB. We want to dynamically and selectively turn ON /OFF the downstream ports. TUSB2077 has 7 POWERONx pins which connect to power distribute switch Enable pins. I need some experts to teach me how to configure TUSB2077 POWERON pin.

Thanks.

Regards;

Chang Cao

over 5 years ago

0 Chang Cao over 5 years ago

Intellectual 520 points

Chang Cao said:

Part Number: TUSB2077A

We will use TUSB2077 to design an USB HUB. We want to dynamically and selectively turn ON /OFF the downstream ports. TUSB2077 has 7 POWERONx pins which connect to power distribute switch Enable pins. I need some experts to teach me how to configure TUSB2077 POWERON pin.

Thanks.

Regards;

Chang Cao

0 JMMN over 5 years ago in reply to Chang Cao

TI__Guru 60870 points

Hello Chang,

USB hubs are slave devices so their port power controls are controlled by the USB host controller using USB commands. These USB commands and power on / power off conditions are defined by the USB specification. They are not specific or able to be modified by the hub.

Regards,

JMMN

0 Chang Cao over 5 years ago in reply to JMMN

Intellectual 520 points

Thanks.

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TUSB2077A: how to configure TUSB2077 POWERON pin?