LPC47M192-NW Standard Microsystems (SMSC), LPC47M192-NW Datasheet - Page 178

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

Specifications of LPC47M192-NW

• Lead Free Status / RoHS Status: Compliant

9.5 SMSC Defined Logical Device Configuration Registers
The SMSC Specific Logical Device Configuration Registers reset to their default values only on PCI resets
generated by Vcc or VTR POR (as shown) or the PCI_RESET# signal. These registers are not affected by soft
resets.
SMSC DS – LPC47M192
FDD Mode Register
Default = 0x0E
on VCC POR,
VTR POR and
PCI RESET
FDD Option Register
Default = 0x00
on VCC POR,
VTR POR and
PCI RESET
Table 70 - Floppy Disk Controller, Logical Device 0 [Logical Device Number = 0x00]
NAME
REG INDEX
0xF0 R/W
0xF1 R/W
DATASHEET
Bit[0] Floppy Mode
Bit[1] FDC DMA Mode
= 0
= 1
Bit[3:2] Interface Mode
= 11
= 10
= 01
= 00
Bit[4] FDC_SWAP
0 = Do Not Swap (default)
1 = Swap Drive 0 (nDS, nMTR pins) with Drive 1
(nDS, nMTR pins)
Bit[5] Reserved, set to zero
Bit[6] FDC Output Type Control
= 0
= 1
Bit[7] FDC Output Control
= 0
= 1
Bit[0] Forced Write Protect
= 0
= 1
nWRTPRT (to the FDC Core) = WP (FDC SRA
register, bit 1) = (nDS0 AND Forced Write Protect)
OR (nDS1 AND Forced Write Protect) OR nWRTPRT
(from the FDD Interface) OR Floppy Write Protect
Note :
Disable register.
Note :
Bit[1] Reserved
Bits[3:2] Density Select
= 00
= 01
= 10
= 11
Bit[7:4] Reserved.
= 0
= 1
Page 178
Normal Floppy Mode (default)
Enhanced Floppy Mode 2 (OS2)
Burst Mode is enabled
Non-Burst Mode (default)
AT Mode (default)
(Reserved)
PS/2
Model 30
FDC outputs are OD12 open drain (default)
FDC outputs are O12 push-pull
FDC outputs active (default)
FDC outputs tri-stated
Inactive (default)
FDD nWRTPRT input is forced active when
either of the drives has been selected.
The Floppy Write Protect bit is in the Device
Boot floppy is always drive 0.
Normal (default)
Normal (reserved for users)
1 (forced to logic “1”)
0 (forced to logic “0”)
DEFINITION
Rev. 03/30/05