Table 20 – Effects of MT and N Bits
MAXIMUM TRANSFER
CAPACITY
FINAL SECTOR READ
FROM DISK
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
MT
0
N
1
1
2
2
3
3
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
1
0
1
0
1
Table 21 – Skip Bit vs Read Data Command
DATA ADDRESS
MARK TYPE
RESULTS
SK BIT
SECTOR CM BIT OF DESCRIPTION OF
ENCOUNTERED
VALUE
READ?
ST2 SET?
RESULTS
0
Normal Data
Deleted Data
Yes
No
Normal
termination.
Address not
0
Yes
Yes
incremented. Next
sector not
searched for.
Normal
1
1
Normal Data
Deleted Data
Yes
No
No
termination.
Normal
Yes
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 22 describes the effect of the SK bit on the Read Deleted Data command execution and results. Except where
noted in Table 22, the C or R value of the sector address is automatically incremented (see
Table 23).
Table 22 – Skip Bit vs. Read Deleted Data Command
RESULTS
DATA ADDRESS
MARK TYPE
SK BIT
VALUE
SECTOR CM BIT OF DESCRIPTION OF
ENCOUNTERED
READ?
ST2 SET?
RESULTS
0
Normal Data
Yes
Yes
Address not
incremented. Next
sector not
searched for.
Normal
0
1
Deleted Data
Normal Data
Yes
No
No
termination.
Normal
Yes
termination.
Sector not read
("skipped").
Normal
termination.
1
Deleted Data
Yes
No
SMSC DS – LPC47M14X
Page 51
Rev. 03/19/2001
SMSC [ SMSC CORPORATION ]
