SIO10N268 Datasheet, PDF (65/251 Pages) SMSC Corporation – Advenced Notebook I/O for ISA or LPC Designs with X-Bus Interface for I/O, Memory, and FWH Emulation and Four Srial Ports

Advanced Notebook I/O for ISA or LPC Designs
Datasheet
BIT NO.
2
1,0
SYMBOL
H
DS1,0
NAME
DESCRIPTION
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 8.18 - Status Register 1
NAME
End of
Cylinder
Data Error
Overrun/
Underrun
No Data
Not Writeable
Missing
Address Mark
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.
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
SYMBOL
CM
DD
WC
Table 8.19 - Status Register 2
NAME
Control Mark
Data Error in
Data Field
Wrong
Cylinder
DESCRIPTION
Unused. This bit is always "0".
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.
The FDC detected a CRC error in the data field.
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".
SMSC SIO10N268
Page 65
DATASHEET
Rev. 0.5 (03-24-05)