Appeal No. 2002-2026
Application No. 09/620,424
memory and utilized by a system processor of the disc drive, as
shown in Figure 2. See page 5 of Appellants' specification.
Figure 11 is a generalized flow chart for a SPLIT SECTOR RECOVERY
routine representative of programming stored in memory and
utilized by a system processor of the disc drive, as shown in
Figure 2. See page 6 of Appellants' specification.
As shown in Figure 2, circuitry used to control the disc
drive 100 includes a spindle control circuit 142, a servo control
circuit 144 and a read/write channel 146, all operably connected
to a system processor 150. It will be recognized that the system
processor 150 communicates with and controls the operation of
these circuits in a known manner, with the exceptions as
discussed below. Additionally, an interface circuit 152 is shown
connected to the read/write channel 146 and to the system
processor 150, with the interface circuit 152 serving as a
conventional data interface and buffer for the disc drive. The
interface circuit 152 includes a sequencer which comprises
hardware used to establish varying timing sequences during the
operation of the read/write channel 146. See page 7 of
Appellants' specification.
Appellants describe in detail the MIS-SYNC RECOVERY routine
as shown in Figure 7 on pages 15 and 16 of Appellants'
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