LPC47M182 SMSC Corporation, LPC47M182 Datasheet - Page 67

• Manufacturer Part Number: LPC47M182
• Description: ADVANCED I/O CONTROLLER WITH MOTHERBOARD GLUE LOGIC
• Manufacturer: SMSC Corporation

Advanced I/O Controller with Motherboard GLUE Logic
Datasheet
6.13
SMSC LPC47M182
MT
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.
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.
command. The MT and SK bits (bits D7 and D5 of the first command byte respectively) should always be
set to “0”.
This command terminates when the EOT specified number of sectors has not been read. If the FDC does
not find an ID Address Mark on the diskette after the second occurrence of a pulse on the nINDEX pin,
then it sets the IC code in Status Register 0 to “01” (abnormal termination), sets the MA bit in Status
Register 1 to “1”, and terminates the command.
NC: No Change, the same value as the one at the beginning of command execution.
LSB: Least Significant Bit, the LSB of H is complemented.
0
1
SK BIT
VALUE
HEAD
0
0
1
1
0
1
0
1
Table 6.21 - Skip Bit vs. Read Deleted Data Command
DATA ADDRESS
ENCOUNTERED
TRANSFERRED TO
MARK TYPE
Deleted Data
Deleted Data
Normal Data
Normal Data
FINAL SECTOR
Less than EOT
Less than EOT
Less than EOT
Less than EOT
Equal to EOT
Equal to EOT
Equal to EOT
Equal to EOT
Table 6.22 - Result Phase Table
HOST
DATASHEET
SECTOR
READ?
Yes
Yes
Yes
No
67
Multi-track or skip operations are not allowed with this
C + 1
C + 1
C + 1
NC
NC
NC
NC
NC
C
ID INFORMATION AT RESULT PHASE
CM BIT OF
ST2 SET?
Yes
Yes
No
No
RESULTS
Revision 1.8 SMSC/Non-SMSC Register Sets (02-24-05)
LSB
LSB
NC
NC
NC
NC
NC
NC
H
Address not
incremented. Next
sector not
searched for.
Normal
termination.
Normal
termination.
Sector not read
(“skipped”).
Normal
termination.
DESCRIPTION
OF RESULTS
R + 1
R + 1
R + 1
R + 1
01
01
01
01
R
The FDC compares the ID
NC
NC
NC
NC
NC
NC
NC
NC
N