Universal Serial Bus InterfaceMCF5253 Reference Manual, Rev. 124-34 Freescale Semiconductor24.6.3.14 On-The-Go Status and Control (OTGSC), Non-EHCIThis register is not defined in the EHCI specification. The USB OTG module implements one On-The-Go(OTG) Status and Control register corresponding to Port 0.The OTGSC register has four sections:• OTG Interrupt enables (Read/Write)• OTG Interrupt status (Read/Write to Clear)• OTG Status inputs (Read Only)• OTG Controls (Read/Write)The status inputs are de-bounced using a 1 msec time constant. Values on the status inputs that do notpersist for more than 1 msec will not cause an update of the Status inputs, or cause and OTG interrupt.1CSCConnect Change Status.In host mode, this bit indicates a change has occurred in the port’s Current Connect Status. the controller sets this bitfor all changes to the port device connect status, even if the system software has not cleared an existing connect statuschange. For example, the insertion status changes twice before the system software has cleared the changed condition,hub hardware will be ‘setting’ an already-set bit (that is—the bit will remain set). The software clears this bit by writinga one to it.1 Connect Status has changed.0 No changeThis field is zero if Port Power(PP) is zero.In device mode, this bit is undefined.0CCSCurrent Connect Status.In host mode:1 Device is present.0 No device present.This field is zero if Port Power(PP) is zero in host mode.In device mode:1 Attached0 Not attachedA one indicates that the device successfully attached and is operating in either high-speed or full-speed as indicatedby the High Speed Port bit in this register. A zero indicates that the device did not attach successfully or was forciblydisconnected by the software writing a zero to the Run bit in the USBCMD register. It does not state the device beingdisconnected or suspended.Table 24-27. Port Status and Control (PORTSC) Register Field Descriptions (continued)Field Description
