SCH3112I-NE SMSC [SMSC Corporation], SCH3112I-NE Datasheet - Page 64

• Manufacturer Part Number: SCH3112I-NE
• Description: LPC IO with 8042 KBC, Reset Generation, HWM and Multiple Serial Ports
• Manufacturer: SMSC [SMSC Corporation]

Rev 0.2 (09-28-04)
BIT NO.
7,6
5
4
3
2
1,0
BIT NO.
7
6
5
4
3
2
1
SYMBOL
IC
SE
EC
H
DS1,0
SYMBOL
EN
DE
OR
ND
NW
NAME
Interrupt Code
Seek End
Equipment
Check
Head Address
Drive Select
NAME
End of
Cylinder
Data Error
Overrun/
Underrun
No Data
Not Writable
Table 7.10 Status Register 0
Table 7.11 Status Register 1
DATASHEET
LPC IO with 8042 KBC, Reset Generation, HWM and Multiple Serial Ports
DESCRIPTION
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. 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".
The current head address.
The current selected drive.
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.
48
SMSC SCH311X
Datasheet