FDC37B727-NS Standard Microsystems (SMSC), FDC37B727-NS Datasheet - Page 59

• Manufacturer Part Number: FDC37B727-NS
• Manufacturer: Standard Microsystems (SMSC)

Specifications of FDC37B727-NS

• Pin Count: 128
• Lead Free Status / RoHS Status: Compliant

Note: If MT is set to "1" and the SC value is greater than the number of remaining formatted sectors on
Format A Track
The Format command allows an entire track to be
formatted.
detected, the FDC starts writing data on the disk
including gaps, address marks, ID fields, and data
fields per the IBM System 34 or 3740 format (MFM
or FM respectively). The particular values that will
be written to the gap and data field are controlled
by the values programmed into N, SC, GPL, and D
which are specified by the host during the
command phase. The data field of the sector is
filled with the data byte specified by D. The ID field
for each sector is supplied by the host; that is, four
data bytes per sector are needed by the FDC for
MT
0
0
0
0
1
1
1
1
Side 0, verifying will continue on Side 1 of the disk.
After a pulse from the IDX pin is
EC
0
0
1
1
0
0
1
1
TABLE 28 - VERIFY COMMAND RESULT PHASE
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
59
C, H, R, and N (cylinder, head, sector number and
sector size respectively).
After formatting each sector, the host must send
new values for C, H, R and N to the FDC for the
next sector on the track. The R value (sector
number) is the only value that must be changed by
the host after each sector is formatted.
allows the disk to be formatted with nonsequential
sector addresses (interleaving). This incrementing
and formatting continues for the whole track until
the FDC encounters a pulse on the IDX pin again
and it terminates the command.
Table 25 contains typical values for gap fields
which are dependent upon the size of the sector
and the number of sectors on each track. Actual
values can vary due to drive electronics.
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
This