SCH3112I-NE SMSC [SMSC Corporation], SCH3112I-NE Datasheet - Page 84

• Manufacturer Part Number: SCH3112I-NE
• Description: LPC IO with 8042 KBC, Reset Generation, HWM and Multiple Serial Ports
• Manufacturer: SMSC [SMSC Corporation]

Rev 0.2 (09-28-04)
MT
0
0
0
0
1
1
1
1
Transfer Capacity
EN (End of Cylinder) bit
ND (No Data) bit
Head Load, Unload Time Interval
ID information when the host terminates the command
Definition of DTL when N = 0 and when N does not = 0
WRITE DELETED DATA
This command is almost the same as the Write Data command except that a Deleted Data Address
Mark is written at the beginning of the Data Field instead of the normal Data Address Mark. This
command is typically used to mark a bad sector containing an error on the floppy disk.
Verify
The Verify command is used to verify the data stored on a disk. This command acts exactly like a
Read Data command except that no data is transferred to the host. Data is read from the disk and
CRC is computed and checked against the previously-stored value.
Because data is not transferred to the host, the TC cycle cannot be used to terminate this command.
By setting the EC bit to “1”, an implicit TC will be issued to the FDC. This implicit TC will occur
when the SC value has decremented to 0 (an SC value of 0 will verify 256 sectors). This command
can also be terminated by setting the EC bit to “0” and the EOT value equal to the final sector to be
checked. If EC is set to “0”, DTL/SC should be programmed to 0FFH. Refer to
and
value.
Definitions:
# Sectors Per Side = Number of formatted sectors per each side of the disk.
# Sectors Remaining = Number of formatted sectors left which can be read, including side 1 of the
disk if MT is set to “1”.
Table 7.21 on page 68
EC
0
0
1
1
0
0
1
1
SC = DTL
EOT <= # Sectors Per Side
SC = DTL
EOT > # Sectors Per Side
SC <= # Sectors Remaining AND
EOT <= # Sectors Per Side
SC > # Sectors Remaining OR
EOT > # Sectors Per Side
SC = DTL
EOT <= # Sectors Per Side
SC = DTL
EOT > # Sectors Per Side
SC <= # Sectors Remaining AND
EOT <= # Sectors Per Side
SC > # Sectors Remaining OR
EOT > # Sectors Per Side
Table 7.21 Verify Command Result Phase
for information concerning the values of MT and EC versus SC and EOT
SC/EOT VALUE
DATASHEET
LPC IO with 8042 KBC, Reset Generation, HWM and Multiple Serial Ports
68
Success Termination
Result Phase Valid
Unsuccessful Termination
Result Phase Invalid
Successful Termination
Result Phase Valid
Unsuccessful Termination
Result Phase Invalid
Successful Termination
Result Phase Valid
Unsuccessful Termination
Result Phase Invalid
Successful Termination
Result Phase Valid
Unsuccessful Termination
Result Phase Invalid
TERMINATION RESULT
Table 7.20 on page 67
SMSC SCH311X
Datasheet