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| 型號(hào)： | LPC47M14I-NC |
| 廠商： | SMSC Corporation |
| 英文描述： | 128 PIN ENGANCED SUPER I/O CONTROLLER WITH AN LPC INTERFACE AND USB HUB |
| 中文描述： | 128引腳ENGANCED超級(jí)I / O與LPC接口和USB集線器控制器 |
| 文件頁(yè)數(shù)： | 38/205頁(yè) |
| 文件大?。?/td> | 1219K |
| 代理商： | LPC47M14I-NC |
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SMSC DS – LPC47M14X
Page 38
Rev. 03/19/2001
Table 14 – Status Register 1
BIT NO.
7
SYMBOL
EN
NAME
End of
Cylinder
DESCRIPTION
The FDC tried to access a sector beyond the final sector
of the track (255D). Will be set if TC is not issued after
Read or Write Data command.
Unused. This bit is always "0".
The FDC detected a CRC error in either the ID field or
the data field of a sector.
Becomes set if the FDC does not receive CPU or DMA
service within the required time interval, resulting in data
overrun or underrun.
Unused. This bit is always "0".
Any one of the following:
1. Read Data, Read Deleted Data command - the FDC
did not find the specified sector.
2. Read ID command - the FDC cannot read the ID field
without an error.
3. Read A Track command - the FDC cannot find the
proper sector sequence.
WP pin became a "1" while the FDC is executing a Write
Data, Write Deleted Data, or Format A Track command.
Any one of the following:
1. The FDC did not detect an ID address mark at the
specified track after encountering the index pulse
from the nINDEX pin twice.
2. The FDC cannot detect a data address mark or a
deleted data address mark on the specified track.
6
5
DE
Data Error
4
OR
Overrun/
Underrun
3
2
ND
No Data
1
NW
Not Writeable
0
MA
Missing
Address Mark
Table 15 – Status Register 2
BIT NO.
7
6
SYMBOL
CM
NAME
Control Mark Any one of the following:
Read Data command - the FDC encountered a deleted
data address mark.
Read Deleted Data command - the FDC encountered a
data address mark.
Data Error in
Data Field
Wrong
Cylinder
from the track address maintained inside the FDC.
Unused. This bit is always "0".
Unused. This bit is always "0".
Bad Cylinder The track address from the sector ID field is different
from the track address maintained inside the FDC and is
equal to FF hex, which indicates a bad track with a hard
error according to the IBM soft-sectored format.
Missing Data
Address Mark
deleted data address mark.
DESCRIPTION
Unused. This bit is always "0".
5
DD
The FDC detected a CRC error in the data field.
4
WC
The track address from the sector ID field is different
3
2
1
BC
0
MD
The FDC cannot detect a data address mark or a
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