Hello,
My customer use TUSB3210 for industrial application.
In the applicaion, There are very short some suspend of power; < 100ms, and then TUSB3210 can not enter enumulation and go to freeze..
( I guess TUSB3210 is not be properly reseted )
Q1
In the Data sheet page 41-42, there are several requirements for /RESET signal .
* RESET = Lo >100us after Vcc reaches to 90%
* RESET come out < 30ms
If rise time of Vcc were very slow, I think it is difficult to keep avobe criteria.
So, simple delay using RC ( Data sheet p30 Fig 2-2) is not be recommennded if rise time of Vcc were slow.
Any SVS should be recommended if rise time of Vcc were slow.
How do you think about this?
Q2
Is there any requirement for 3.3V power down and up?
For example
;3.3V should fall within __ ms ,
;keep low more than _ ms
;3.3V should rise within _ms
I can not find those requirement is the data sheet, so I think only the reset timing in the page 41 is necessary.
With My Best Regards
