LPC47M192-NW Standard Microsystems (SMSC), LPC47M192-NW Datasheet - Page 41

• Manufacturer Part Number: LPC47M192-NW
• Manufacturer: Standard Microsystems (SMSC)

Specifications of LPC47M192-NW

• Lead Free Status / RoHS Status: Compliant

PS/2 Model 30 Mode
BIT 0 and 1 DATA RATE SELECT 0 and 1
These bits determine the data rate of the floppy controller. See Table 8 for the appropriate values.
BIT 2 NO PRECOMPENSATION
This bit can be set by software, but it has no functionality. It can be read by bit 2 of the DSR when in Model 30
register mode. Unaffected by software reset.
BIT 3 – 7 RESERVED
Should be set to a logical “0”
Table 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.
7.4.2 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.
SMSC DS – LPC47M192
BIT NO.
BIT NO.
RESET
COND.
7,6
1,0
5
4
3
2
7
6
5
IC
SE
EC
H
DS1,0
EN
DE
SYMBOL
SYMBOL
N/A
7
0
N/A
6
0
Interrupt Code 00 - Normal termination of command.
Seek End
Equipment
Check
Head Address The current head address.
Drive Select
End
Cylinder
Data Error
NAME
NAME
DATASHEET
Table 12 – Status Register 0
Table 13 – Status Register 1
N/A
5
0
of
command was properly executed and completed without
error.
01 - Abnormal termination of 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. Step pulses in the Recalibrate command.
2. The Relative Seek command caused the FDC to
Unused. This bit is always "0".
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.
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step outward beyond Track 0.
N/A
4
0
N/A
3
0
DESCRIPTION
DESCRIPTION
NOPREC DRATE
N/A
2
SEL1
1
1
The specified
Command
DRATE
SEL0
0
0
Rev. 03/30/05