Hi,
Customer is considering the following constitution.
“Hub⇔TS3USB221⇔Device”
As part of the specification, Customer wants to turn off the power of the hub with the USB communication connected.
In the customer design process, I got the following question.
Could you give me your advice?
①
In the case of “①Bus-switch disable and Vcc=3.3V” and “②Bus-switch enable and Vcc=0V”,
Is the communication line of ① and ② the same disconnected state(Hi-Z)?
②
Is it OK to add the High signal to the /OE pin in VCC is 0V condition?
③
Once the / OE pin is brought High to disconnect communication,
After that, when the / OE pin and Vcc are simultaneously turned OFF,
Can this device keep disconnected state?
Customers are concerned about the possibility of communicating even momentarily.
Best Regards,
Yusuke/Japan Disty
