FDC37C672 View Datasheet(PDF) - SMSC -> Microchip
Part Name
Description
Manufacturer
FDC37C672 Datasheet PDF : 173 Pages
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Enhanced Super I/O Controller with Fast IR
Datasheet
SK BIT
VALUE
DATA ADDRESS
MARK TYPE
ENCOUNTERED
0 Normal Data
Table 8.3 - Skip Bit vs Read Data Command
SECTOR READ?
Yes
RESULTS
CM BIT OF ST2 SET?
No
DESCRIPTION OF
RESULTS
Normal termination.
0 Deleted Data
Yes
1 Normal Data
Yes
Yes
Address not
incremented. Next sector
not searched for.
No
Normal termination.
1 Deleted Data
No
Yes
Normal termination.
Sector not read
("skipped").
8.1.2 Read Deleted Data
This command is the same as the Read Data command, only it operates on sectors that contain a Deleted
Data Address Mark at the beginning of a Data Field.
Table 8.4 describes the effect of the SK bit on the Read Deleted Data command execution and results.
Except where noted in Table 8.4, the C or R value of the sector address is automatically incremented (see
Table 8.5).
Table 8.4 - Skip Bit vs. Read Deleted Data Command
SK BIT
VALUE
DATA ADDRESS
MARK TYPE
ENCOUNTERED
RESULTS
SECTOR READ?
CM BIT OF ST2 SET?
0 Normal Data
Yes
Yes
DESCRIPTION OF
RESULTS
Address not
incremented. Next sector
not searched for.
0 Deleted Data
Yes
1 Normal Data
No
No
Normal termination.
Yes
Normal termination.
Sector not read
("skipped").
1 Deleted Data
Yes
No
Normal termination.
8.1.3 Read A Track
This command is similar to the Read Data command except that the entire data field is read continuously
from each of the sectors of a track. Immediately after encountering a pulse on the nINDEX pin, the FDC
starts to read all data fields on the track as continuous blocks of data without regard to logical sector
numbers. If the FDC finds an error in the ID or DATA CRC check bytes, it continues to read data from the
track and sets the appropriate error bits at the end of the command. The FDC compares the ID
SMSC FDC37C672
Page 51
PRELIMINARY DATASHEET
Rev. 10-29-03
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