LPC47M10X View Datasheet(PDF) - SMSC -> Microchip
Part Name
Description
MFG CO.
LPC47M10X
SMSC -> Microchip
'LPC47M10X' PDF : 188 Pages View PDF
STATUS REGISTER ENCODING
During the Result Phase of certain commands, the Data Register contains data bytes that give the status of the
command just executed.
BIT NO.
7,6
5
4
3
2
1,0
SYMBOL
IC
SE
EC
H
DS1,0
Table 12 - Status Register 0
NAME
DESCRIPTION
Interrupt Code 00 - Normal termination of command. The specified
command was properly executed and completed without
error.
01 - Abnormal termination of command. Command
execution was started, but was not successfully
completed.
10 - Invalid command. The requested command could
not be executed.
11 - Abnormal termination caused by Polling.
Seek End
The FDC completed a Seek, Relative Seek or
Recalibrate command (used during a Sense Interrupt
Command).
Equipment The TRK0 pin failed to become a "1" after:
Check
1. 80 step pulses in the Recalibrate command.
2. The Relative Seek command caused the FDC to
step outward beyond Track 0.
Unused. This bit is always "0".
Head Address The current head address.
Drive Select The current selected drive.
BIT NO.
7
6
5
4
3
2
1
0
SYMBOL
EN
DE
OR
ND
NW
MA
Table 13 - Status Register 1
NAME
DESCRIPTION
End of
The FDC tried to access a sector beyond the final sector
Cylinder
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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