LPC47M182 datasheet(69/223 Pages) SMSC

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Advanced I/O Controller with Motherboard GLUE Logic

Datasheet

SMSC LPC47M182

Revision 1.8 SMSC/Non-SMSC Register Sets (02-24-05)

DATASHEET

Table 6.23 - Verify Command Result Phase Table

SC/EOT VALUE

TERMINATION RESULT

SC = DTL

EOT <= # Sectors Per Side

Success Termination

Result Phase Valid

SC = DTL

EOT > # Sectors Per Side

Unsuccessful Termination

Result Phase Invalid

SC <= # Sectors Remaining AND

EOT <= # Sectors Per Side

Successful Termination

Result Phase Valid

SC > # Sectors Remaining OR

EOT > # Sectors Per Side

Unsuccessful Termination

Result Phase Invalid

SC = DTL

EOT <= # Sectors Per Side

Successful Termination

Result Phase Valid

SC = DTL

EOT > # Sectors Per Side

Unsuccessful Termination

Result Phase Invalid

SC <= # Sectors Remaining AND

EOT <= # Sectors Per Side

Successful Termination

Result Phase Valid

SC > # Sectors Remaining OR

EOT > # Sectors Per Side

Unsuccessful Termination

Result Phase Invalid

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.

6.17

Format A Track

The Format command allows an entire track to be formatted. After a pulse from the nINDEX pin is

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 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. This 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 nINDEX pin again and it terminates the command.

Table 6.24 contains typical values for gap fields that are dependent upon the size of the sector and the

number of sectors on each track. Actual values can vary due to drive electronics.

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