User`s guide

i.MX53 System Development User’s Guide, Rev. 1
Freescale Semiconductor 23-1
Chapter 23
Porting USB Host1 and USB OTG
The USB Host1 and the USB OTG signals do not multiplex with other pins on the i.MX53. Therefore, it
is not necessary to port IOMUX settings for these interfaces when moving to a new platform.
The only required setup is as follows:
• For the USB Host1 PHY
— Supply USB_H1_VDDA33 with 3.3 V
— Supply USB_H1_VDDA25 with 2.5 V
• For the USB OTG PHY
— Supply USB_OTG_VDDA33 with 3.3 V
— Supply USB_OTG_VDDA25 with 2.5 V
The USB Host1 PHY uses the following signals:
• USB_H1_GPANAIO
• USB_H1_RREFEXT
• USB_H1_DP
• USB_H1_VDDA33
• USB_H1_DN
• USB_H1_VDDA25
• USB_H1_VBUS
The USB OTG PHY uses the following signals:
• USB_OTG_VBUS
• USB_OTG_ID
• USB_OTG_VDDA25
• USB_OTG_DN
• USB_OTG_VDDA33
• USB_OTG_DP
• USB_OTG_RREFEXT
• USB_OTG_GPANAIO