Hi,
The USB0_VDDA12 pin description in the latest revision of OMAP-L138 DS (SPRS586H) have added the following requirement: "Table 3-32. Unused USB0 and USB1 Signal Configurations" - "When USB0 and USB1 are not used" - "USB0_VDDA12" - "Internal USB PHY output connected to an external 0.22-uF filter capacitor" (instead of "No connect" as in previous revision).
This correction is agreed with the statement introduced in previous DS version: "For proper device operation, this pin must always be connected via a 1 uF capacitor to VSS (GND), even if USB0 is not being used."
However, an year ago I've asked about similar correction in C6745 DS and the answer was: "The latest datasheet is not correct and will be corrected. When USB0 and USB1 are not used, USB0_VDDA12 is NO CONNECT".
So I'm forced to repeat my question (for L138 now):
We are currently shipping some products based on OMAP-L138 with no capacitor at USB0_VDDA12 pin to our customers. These products have both USB0 and USB1 unused. So what might be the possible negative effects related to the lack of that capacitor?
BR,
Denis