OMAP-L137
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SPRS563G – SEPTEMBER 2008 – REVISED JUNE 2014
3.7.22 Unused USB0 (USB2.0) and USB1 (USB1.1) Pin Configurations
If one or both USB modules on the device are not used, then some of the power supplies to those
modules may not be required. This can eliminate the requirement for a 1.8V power supply to the USB
modules. The required pin configurations for unused USB modules are shown below.
Table 3-26. Unused USB0 and USB1 Pin Configurations
SIGNAL NAME
Configuration
Configuration
(When USB0 and USB1 are not used)
(When USB0 is used
and USB1 is not used)
USB0_DM
No connect
Use as USB0 function
USB0_DP
No connect
Use as USB0 function
USB0_VDDA33
No connect
3.3V
USB0_VDDA18
No connect
1.8V
USB0_ID
No connect
Use as USB0 function
USB0_VBUS
No connect
Use as USB0 function
USB0_DRVVBUS/GP4[15]
No connect or use as alternate function
Use as USB0 or alternate function
USB0_VDDA12
Internal USB0 PHY output connected to an external 0.22
μ
F filter capacitor
USB1_DM
No connect
VSS
USB1_DP
No connect
VSS
USB1_VDDA33
No connect
No connect
USB1_VDDA18
No connect
No connect
AHCLKX0/AHCLKX2/USB_REFCLKIN/
No connect or use as alternate function
Use as USB0 or alternate function
GP2[11]
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