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參數(shù)資料
| 型號(hào)： | 37C669 |
| 廠商： | SMSC Corporation |
| 英文描述： | DIODE SCHOTTKY SINGLE 25V 200mW 0.5V-vf 200mA-IFM 30mA-IF 2uA-IR SOD-323 3K/REEL |
| 中文描述： | 電腦98/99順從超級(jí)I / O軟盤控制器與紅外線支持 |
| 文件頁數(shù)： | 122/164頁 |
| 文件大?。?/td> | 621K |
| 代理商： | 37C669 |
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60
Table 24 - Result Phase Table
ID INFORMATION AT RESULT PHASE
MT
HEAD
FINAL SECTOR
TRANSFERRED TO HOST
C
H
R
N
0
Less than EOT
NC
R + 1
NC
Equal to EOT
C + 1
NC
01
NC
1
Less than EOT
NC
R + 1
NC
0
Equal to EOT
C + 1
NC
01
NC
0
Less than EOT
NC
R + 1
NC
Equal to EOT
NC
LSB
01
NC
1
Less than EOT
NC
R + 1
NC
1
Equal to EOT
C + 1
LSB
01
NC
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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