Dual communication port sharing apparatus
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United States of America Patent
Stats
-
Aug 2, 2005
Grant Date -
Jun 12, 2003
app pub date -
Jun 10, 2002
filing date -
Dec 12, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An arbitration and data source selection mechanism arbitrating access to a shared communication port between a servo engine and a controller of a disc drive 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). Servo control code and control code 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.
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