LPC47M112 SMSC Corporation, LPC47M112 Datasheet - Page 55
LPC47M112
Manufacturer Part Number
LPC47M112
Description
ENHANCED SUPER I/O CONTROLLER WITH LPC INTERFACE
Manufacturer
SMSC Corporation
Datasheet
1.LPC47M112.pdf
(208 pages)
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Enhanced Super I/O Controller with LPC Interface
Datasheet
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 21 describes the effect of the SK bit on the Read Deleted Data command execution and results.
Except where noted in Table 21, the C or R value of the sector address is automatically incremented (see Table 22).
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 information read from each sector with the specified value in the command and
sets the ND flag of Status Register 1 to a “1” if there no comparison. Multi-track or skip operations are not allowed with
this command. The MT and SK bits (bits D7 and D5 of the first command byte respectively) should always be set to "0".
SMSC DS – LPC47M112
VALUE
SK BIT
0
1
1
VALUE
SK BIT
0
0
1
1
DATA
ADDRESS
MARK TYPE
ENCOUNTER
ED
Deleted Data
Normal Data
Deleted Data
Normal Data
Deleted Data
Normal Data
Deleted Data
DATA ADDRESS
Table 21 - Skip Bit vs. Read Deleted Data Command
ENCOUNTERED
MARK TYPE
DATASHEET
SECTOR
READ?
Yes
Yes
No
SECTOR
READ?
Yes
Yes
Yes
Page 55
No
CM BIT OF
ST2 SET?
Yes
Yes
No
CM BIT OF
RESULTS
ST2 SET?
Yes
Yes
No
No
RESULTS
DESCRIPTION OF
Address not
incremented. Next
sector not
searched for.
Normal
termination.
Normal
termination.
Sector not read
("skipped").
RESULTS
DESCRIPTION OF
Address not
incremented. Next
sector not
searched for.
Normal
termination.
Normal
termination.
Sector not read
("skipped").
Normal
termination.
RESULTS
Rev. 02/02/2005
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