Other Parts Discussed in Thread: OMAP-L138
Hi,
My customer is now designing OMAP-L138 board.
Their application is a printer. So, OMAP-L138 USB operates as Device mode only.
They connect 'L138's USB0_VBUS pin' directly to 'USB connector's VBUS pin' (without any pull-up or down resistor to 5V or GND).
Is this no problem ?
Looking into Table 3. USB Terminal Functions, sprufm9h (USB2.0 User's Guide), I found a sentence for USB0_VBUS.
==> "For device or host only mode of operation, pull-up this pin to 5V with an external 1K ohm resistor."
So, I am wondering if the customer needs to place 1K ohm pull-up resistor to 'L138 VBUS === connector VBUS' line.
Please advise.
Best regards,