LPC47B34X Datasheet, PDF (40/250 Pages) SMSC Corporation – 128 Pin Enhanced Super I/O with LPC Interface for Consumer Applications

BIT NO.
7
6
5
4
3
2
1
0
SYMBOL
EN
DE
OR
ND
NW
MA
Table 12 - Status Register 1
NAME
DESCRIPTION
End of
The FDC tried to access a sector beyond the final
Cylinder
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".
Data Error The FDC detected a CRC error in either the ID field or
the data field of a sector.
Overrun/
Becomes set if the FDC does not receive CPU or DMA
Underrun
service within the required time interval, resulting in
data overrun or underrun.
Unused. This bit is always "0".
No Data
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.
Not Writeable WP pin became a "1" while the FDC is executing a
Write Data, Write Deleted Data, or Format A Track
command.
Missing
Any one of the following:
Address Mark 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.
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