| 摘要 |
An arbitration and data source selection mechanism (such as 150) arbitrating access to a shared communication port (such as 152) between a servo engine (such as 148) and a controller (such as 144) of a disc drive (such as 100) is disclosed. In a preferred embodiment, the arbitration and data source selection mechanism, the shared communication port, the servo engine and the controller collectively share a common die of an application specific integrate circuit (ASIC) (such as 157). Servo control code (such as 176) and control code (such as 174) are each loaded into the ASIC for operation of the disc drive. The servo engine is allowed to hold service of the shared serial port dedicated to the servo control code for any length of time required by the servo engine. During periods of non-use by the servo control code, the servo engine releases the shared serial port to the controller for dedicated use by the control code, for a predetermined period of time. |
