TUSB1310: pwrpresent pin of tusb1310 is always low

Doohan:

     Do you have voltage divider on Vbus pin? Do you follow power on sequence on figure 3.1?

     By the way, this device is NRND.

Regards

Brian

Thanks, you response. and i have more questions!

question 1) we use tusb1310a as ulpi mode, but i know pwrpresent is pin of pipe side.

if ISO_START is high(ulpi mode), is it correct that pwrpresent is low?

question 2) we are using tusb1310a by ulpi mode, i initialzed strapping pin like belows. is is correct?

XTAL_DIS -> 1

SSC_DIS -> 0

PIPI_16BIT -> 0

ISO_START -> 1

ULPI_8BIT -> 0 

REFCLKSEL1 -> 1

REFCLKSEL0 -> 1

question 3) how can i check whether initialization of tusb1310a is success or not??

Thnaks, 

Doohan 

Doohan:

       Since this device is NRND and limited resource, we can only support questions in datasheet.

Regards

Brian

nrnd? limited resource? what are you saying?

Tusb1310a is product of TI.. I am asking for datasheet of tusb1310a now. 

Doohan:

    Sorry for confusion, This device has lots of bugs, that's why we put it as NRND ( not recommend for new design). We only support  customer which already in production.

Regards

Brian