- * This event is not normally active - it must be manually enabled and disabled via the\r
- * \ref USB_Device_EnableSOFEvents() and \ref USB_Device_DisableSOFEvents() commands after enumeration.\r
+ * This event is time-critical; it is run once per millisecond and thus long handlers will significantly\r
+ * degrade device performance. This event should only be enabled when needed to reduce device wakeups.\r
+ *\r
+ * \note This event is not normally active - it must be manually enabled and disabled via the\r
+ * \ref USB_Device_EnableSOFEvents() and \ref USB_Device_DisableSOFEvents() commands after enumeration.\r