Hello,
I want to understand the implication on use of a architecture where we use Sitara AM3352 USB1 functioning as HOST connected with another component acting like DEVICE but with a eletrical circuit without DRVBUS signal used together with a switch
We power on the DEVICE using a load switch controlled by PMIC LDO not by DRVBUS signal before start a USB session. We will attach the DEVICE "one time only" during the start up of our system. If detected some problem on system we will be allowed to restart using a power off/ power on procedure.
Now, we have a prototype board functioning with this hardware aproach and we have 100% sucess enumerating of the DEVICE on USB1. We are in a stage of project where we have few resources to change the hardware. Of course we understand that this is not a usual approach but we need to verify if there is potential to spourius behaviour of the USB Controller or, because the unique requirement of "on time only" attachment, we can go with this arrangement.
Regards.
