Good evening, all.
I'm trying to create a board based on the Teensy 4.1 design, and may have run into a power sequencing issue. My design will only support one USB port, so I have only connected +5V power to the USB1_Vbus pin. USB2_Vbus is floating.
That seems find and dandy, since NXP documents state that unused RT1062 analog pins, including USB stuff, can be left disconnected.
However, Paul connects both USB1_Vbus and USB2_Vbus to VIN or Vusb, and these pins start the critical power-sequencing process. Will my design power-sequence properly if only the USB1_Vbus pin is connected?
I've Gerbered the board already, so it's too late to make what would be a pretty trivial change, thus I'm hoping to get a 'that should be fine' from you guys.
Many thanks!
Biff
I'm trying to create a board based on the Teensy 4.1 design, and may have run into a power sequencing issue. My design will only support one USB port, so I have only connected +5V power to the USB1_Vbus pin. USB2_Vbus is floating.
That seems find and dandy, since NXP documents state that unused RT1062 analog pins, including USB stuff, can be left disconnected.
However, Paul connects both USB1_Vbus and USB2_Vbus to VIN or Vusb, and these pins start the critical power-sequencing process. Will my design power-sequence properly if only the USB1_Vbus pin is connected?
I've Gerbered the board already, so it's too late to make what would be a pretty trivial change, thus I'm hoping to get a 'that should be fine' from you guys.
Many thanks!
Biff