LPC47M192 datasheet(55/228 Pages) SMSC

55 / 228 page

SMSC DS – LPC47M192

Page 55

Rev. 03/30/05

DATASHEET

execution and results. Except where noted in Table 20, the C or R value of the sector address is automatically

incremented (see Table 22).

Table 19 – Effects of MT and N Bits

MAXIMUM TRANSFER

CAPACITY

FINAL SECTOR READ

FROM DISK

256 x 26 = 6,656

256 x 52 = 13,312

512 x 15 = 7,680

512 x 30 = 15,360

1024 x 8 = 8,192

1024 x 16 = 16,384

26 at side 0 or 1

26 at side 1

15 at side 0 or 1

15 at side 1

8 at side 0 or 1

16 at side 1

Table 20 – Skip Bit vs Read Data Command

RESULTS

SK BIT

VALUE

DATA ADDRESS

MARK TYPE

ENCOUNTERED

SECTOR

READ?

CM BIT OF

ST2 SET?

DESCRIPTION

OF RESULTS

Normal Data

Deleted Data

Normal Data

Deleted Data

Yes

Normal

termination.

Address not

incremented. Next

sector not

searched for.

Normal

termination.

Normal

termination.

Sector not read

(“skipped”).

Read Deleted Data

This command is the same as the Read Data command, only it operates on sectors that contain a Deleted Data

Address Mark at the beginning of a Data Field.

Table 21 describes the effect of the SK bit on the Read Deleted Data command execution and results. Except where

noted in Table 21, the C or R value of the sector address is automatically incremented (see Table 22).

Table 21 – Skip Bit vs. Read Deleted Data Command

RESULTS

SK BIT

VALUE

DATA ADDRESS

MARK TYPE

ENCOUNTERED

SECTOR

READ?

CM BIT OF

ST2 SET?

DESCRIPTION

OF RESULTS

Normal Data

Deleted Data

Normal Data

Deleted Data

Yes

Address not

incremented. Next

sector not

searched for.

Normal

termination.

Normal

termination.

Sector not read

(“skipped”).

Normal

termination.

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

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