LPC47M172 SMSC Corporation, LPC47M172 Datasheet - Page 50

• Manufacturer Part Number: LPC47M172
• Description: ADVANCED I/O CONTROLLER WITH MOTHERBOARD GLUE LOGIC
• Manufacturer: SMSC Corporation

Advanced I/O Controller with Motherboard GLUE Logic
Datasheet
BIT 3 – 7 RESERVED
6.4.12 Status Register Encoding
SMSC/Non-SMSC Register Sets (Rev. 02-27-04)
BIT NO.
BIT NO.
Should be set to a logical “0”
Table 6.9 shows the state of the DENSEL pin. The DENSEL pin is set high after a hardware reset and is
unaffected by the DOR and the DSR resets.
During the Result Phase of certain commands, the Data Register contains data bytes that give the status
of the command just executed.
7,6
1,0
5
4
3
2
7
6
5
4
3
IC
SE
EC
H
DS1,0
EN
DE
OR
SYMBOL
SYMBOL
Interrupt
Code
Seek End
Equipment
Check
Head
Address
Drive Select
End of
Cylinder
Data Error
Overrun/
Underrun
Table 6.12 - Status Register 0
Table 6.13 - Status Register 1
NAME
NAME
DATASHEET
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.
The FDC completed a Seek, Relative Seek or
Recalibrate command (used during a Sense Interrupt
Command).
The TRK0 pin failed to become a "1" after:
1.
2.
Unused. This bit is always "0".
The current head address.
The current selected drive.
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".
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Step pulses in the Recalibrate command.
The Relative Seek command caused the FDC to
step outward beyond Track 0.
DESCRIPTION
DESCRIPTION
SMSC LPC47M172