LPC47M192 View Datasheet(PDF) - SMSC -> Microchip
Part Name
Description
MFG CO.
'LPC47M192' PDF : 228 Pages View PDF
BIT NO.
4
3
2
1
0
SYMBOL
OR
ND
NW
MA
NAME
Overrun/
Underrun
No Data
Not Writeable
Missing
Address Mark
DESCRIPTION
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.
BIT NO.
7
6
5
4
3
2
1
0
SYMBOL
CM
DD
WC
BC
MD
Table 14 – Status Register 2
NAME
DESCRIPTION
Unused. This bit is always "0".
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 The FDC detected a CRC error in the data field.
Data Field
Wrong
Cylinder
The track address from the sector ID field is different
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 The FDC cannot detect a data address mark or a
Address Mark deleted data address mark.
BIT NO.
7
6
5
4
3
2
1,0
SYMBOL
WP
T0
HD
DS1,0
Table 15 – Status Register 3
NAME
Write
Protected
Track 0
Head Address
Drive Select
DESCRIPTION
Unused. This bit is always "0".
Indicates the status of the WRTPRT pin.
Unused. This bit is always "1".
Indicates the status of the TRK0 pin.
Unused. This bit is always "1".
Indicates the status of the HDSEL pin.
Indicates the status of the DS1, DS0 pins.
SMSC DS – LPC47M192
Page 42
DATASHEET
Rev. 03/30/05
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