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參數(shù)資料
| 型號(hào)： | LPC47M172 |
| 廠商： | SMSC Corporation |
| 英文描述： | ADVANCED I/O CONTROLLER WITH MOTHERBOARD GLUE LOGIC |
| 中文描述： | 先進(jìn)的I / O控制器與主板膠合邏輯 |
| 文件頁(yè)數(shù)： | 56/228頁(yè) |
| 文件大小： | 1269K |
| 代理商： | LPC47M172 |
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fields on the track as continuous blocks of data without regard to logical sector numbers. If the FDC finds an error in
the ID or DATA CRC check bytes, it continues to read data from the track and sets the appropriate error bits at the
end of the command. The FDC compares the ID information read from each sector with the specified value in the
command and sets the ND flag of Status Register 1 to a “1” if there no comparison. Multi-track or skip operations are
not allowed with this command. The MT and SK bits (bits D7 and D5 of the first command byte respectively) should
always be set to “0”.
This command terminates when the EOT specified number of sectors has not been read. If the FDC does not find an
ID Address Mark on the diskette after the second occurrence of a pulse on the nINDEX pin, then it sets the IC code in
Status Register 0 to “01” (abnormal termination), sets the MA bit in Status Register 1 to “1”, and terminates the
command.
SMSC DS – LPC47M192
Page 56
Rev. 03/30/05
DATASHEET
Table 22 – Result Phase Table
MT
0
1
HEAD
0
1
0
1
FINAL SECTOR
TRANSFERRED TO
HOST
Less than EOT
Equal to EOT
Less than EOT
Equal to EOT
Less than EOT
Equal to EOT
Less than EOT
Equal to EOT
ID INFORMATION AT RESULT PHASE
C
H
NC
NC
C + 1
NC
NC
NC
C + 1
NC
NC
NC
NC
LSB
NC
NC
C + 1
LSB
R
N
NC
NC
NC
NC
NC
NC
NC
NC
R + 1
01
R + 1
01
R + 1
01
R + 1
01
NC: No Change, the same value as the one at the beginning of command execution.
LSB: Least Significant Bit, the LSB of H is complemented.
Write Data
After the Write Data command has been issued, the FDC loads the head (if it is in the unloaded state), waits the
specified head load time if unloaded (defined in the Specify command), and begins reading ID fields. When the sector
address read from the diskette matches the sector address specified in the command, the FDC reads the data from
the host via the FIFO and writes it to the sector’s data field.
After writing data into the current sector, the FDC computes the CRC value and writes it into the CRC field at the end
of the sector transfer. The Sector Number stored in “R” is incremented by one, and the FDC continues writing to the
next data field. The FDC continues this “Multi-Sector Write Operation”. Upon receipt of a terminal count signal or if a
FIFO over/under run occurs while a data field is being written, then the remainder of the data field is filled with zeros.
The FDC reads the ID field of each sector and checks the CRC bytes. If it detects a CRC error in one of the ID fields,
it sets the IC code in Status Register 0 to “01” (abnormal termination), sets the DE bit of Status Register 1 to “1”, and
terminates the Write Data command.
The Write Data command operates in much the same manner as the Read Data command. The following items are
the same. Please refer to the Read Data Command for details:
Transfer Capacity
EN (End of Cylinder) bit
ND (No Data) bit
Head Load, Unload Time Interval
ID information when the host terminates the command
Definition of DTL when N = 0 and when N does not = 0
Write Deleted Data
This command is almost the same as the Write Data command except that a Deleted Data Address Mark is written at
the beginning of the Data Field instead of the normal Data Address Mark. This command is typically used to mark a
bad sector containing an error on the floppy disk.
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相關(guān)代理商/技術(shù)參數(shù) |
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| LPC47M172_07 | 制造商:SMSC 制造商全稱(chēng):SMSC 功能描述:Advanced I/O Controller with Motherboard GLUE Logic |
| LPC47M172-NR | 制造商:SMSC 功能描述:MULTIFUNCTION PERIPHERAL, PQFP128 |
| LPC47M172-NW | 功能描述:輸入/輸出控制器接口集成電路 Enhanced Super I/O Contrllr RoHS:否 制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray |
| LPC47M182 | 制造商:SMSC 制造商全稱(chēng):SMSC 功能描述:ADVANCED I/O CONTROLLER WITH MOTHERBOARD GLUE LOGIC |
| LPC47M182_07 | 制造商:SMSC 制造商全稱(chēng):SMSC 功能描述:Advanced I/O Controller with Motherboard GLUE Logic |
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