FDC37B77X SMSC Corporation, FDC37B77X Datasheet - Page 56

• Manufacturer Part Number: FDC37B77X
• Description: ENHANCED SUPER I/O CONTROLLER WITH WAKE UP FEATURES
• Manufacturer: SMSC Corporation

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, TC
(pin
command.
implicit TC will be issued to the FDC. This
implicit TC will occur when the SC value has
decremented
Note: If MT is set to "1" and the SC value is greater than the number of remaining formatted sectors
on Side 0, verifying will continue on Side 1 of the disk.
MT
0
0
0
0
1
1
1
1
89) cannot be used to terminate this
By setting the EC bit to "1", an
to 0 (an SC value of 0 will
EC
0
0
1
1
0
0
1
1
Table 24 - Verify Command Result Phase Table
SC = DTL
EOT
SC = DTL
EOT > # Sectors Per Side
SC
EOT
SC > # Sectors Remaining OR
EOT > # Sectors Per Side
SC = DTL
EOT
SC = DTL
EOT > # Sectors Per Side
SC
EOT
SC > # Sectors Remaining OR
EOT > # Sectors Per Side
# Sectors Remaining AND
# Sectors Remaining AND
# Sectors Per Side
# Sectors Per Side
# Sectors Per Side
# Sectors Per Side
SC/EOT VALUE
56
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 Table 23 and
Table 24 for information concerning the values
of MT and EC versus SC and EOT 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".
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