lpcware

will lpc1788 usb1 work as host without VBUS/USB_PWRD1 connection?

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by matianfu on Fri Jan 23 05:11:27 MST 2015
I am using lpc1788 (LQFP208) for a new design.

We need two usb host ports and lcd.

I found if I use P1_22 as USB_PWRD1, then LCD_VD[12] must go to P1_26, which is the only pin possible for LCD_VD[20].

I understand that if a standalone OTG-PHY is added, then MCU don't need USB_PWRD1 (maybe it can read regs from OTG-PHY, I guest) , but that will add extra cost. So my question is, if I can use another GPIO for VBUS instead of USB_PWRD11 pin? or could the software work without knowing VBUS status (we have OCP after all)?

Anybody can give some advice? Thanks.

matianfu

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