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LPC47M14X Arkusz danych(PDF) 51 Page - SMSC Corporation |
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LPC47M14X Arkusz danych(HTML) 51 Page - SMSC Corporation |
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51 / 205 page ![]() SMSC DS – LPC47M14X Page 51 Rev. 03/19/2001 Table 20 – Effects of MT and N Bits MT N MAXIMUM TRANSFER CAPACITY FINAL SECTOR READ FROM DISK 0 1 0 1 0 1 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 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 21 – 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 0 0 1 1 Normal Data Deleted Data Normal Data Deleted Data Yes Yes Yes No No Yes No 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 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 SK BIT VALUE DATA ADDRESS MARK TYPE ENCOUNTERED SECTOR READ? CM BIT OF ST2 SET? DESCRIPTION OF RESULTS 0 0 1 1 Normal Data Deleted Data Normal Data Deleted Data Yes Yes No Yes Yes No Yes No Address not incremented. Next sector not searched for. Normal termination. Normal termination. Sector not read ("skipped"). Normal termination. |
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