FDC37C672QFP SMSC Corporation, FDC37C672QFP Datasheet - Page 51

• Manufacturer Part Number: FDC37C672QFP
• Description: ENHANCED SUPER I/O CONTROLLER WITH FAST IR
• Manufacturer: SMSC Corporation

Enhanced Super I/O Controller with Fast IR
Datasheet
8.1.2
8.1.3
SMSC FDC37C672
VALUE
VALUE
SK BIT
SK BIT
0
0
1
1
0
0
1
1
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).
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.
Normal Data
Deleted Data
Normal Data
Deleted Data
Normal Data
Deleted Data
Normal Data
Deleted Data
DATA ADDRESS
DATA ADDRESS
ENCOUNTERED
ENCOUNTERED
MARK TYPE
MARK TYPE
PRELIMINARY DATASHEET
Table 8.4 - Skip Bit vs. Read Deleted Data Command
Table 8.3 - Skip Bit vs Read Data Command
SECTOR READ?
SECTOR READ?
Yes
Yes
Yes
Yes
Yes
Yes
No
No
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CM BIT OF ST2 SET?
CM BIT OF ST2 SET?
RESULTS
RESULTS
Yes
Yes
Yes
Yes
No
No
No
No
The FDC compares the ID
Normal termination.
Address not
incremented. Next sector
not searched for.
Normal termination.
Normal termination.
Sector not read
("skipped").
Address not
incremented. Next sector
not searched for.
Normal termination.
Normal termination.
Sector not read
("skipped").
Normal termination.
DESCRIPTION OF
DESCRIPTION OF
RESULTS
RESULTS
Rev. 10-29-03