FDC37M707-MS Standard Microsystems (SMSC), FDC37M707-MS Datasheet - Page 144

• Manufacturer Part Number: FDC37M707-MS
• Manufacturer: Standard Microsystems (SMSC)

Specifications of FDC37M707-MS

• Pin Count: 100
• Lead Free Status / RoHS Status: Compliant

The SMSC Specific Logical Device Configuration Registers reset to their default values only on hard
resets generated by Vcc or VTR POR (as shown) or the RESET_DRV signal. These registers are not
affected by soft resets.
FDD Mode Register
Default = 0x0E
on Vcc POR or
Reset_Drv
FDD Option
Register
Default = 0x00
on Vcc POR or
Reset_Drv
Table 59 - Floppy Disk Controller, Logical Device 0 [Logical Device Number = 0x00]
NAME
REG INDEX
0xF0 R/W
0xF1 R/W
Bit[0] Floppy Mode
Bit[1] FDC DMA Mode
= 0
= 1
Bit[3:2] Interface Mode
= 11
= 10
= 01
= 00
Bit[4] Reserved
Bit[5] Reserved, set to zero
Bit[6] FDC Output Type Control
= 0
= 1
Bit[7] FDC Output Control
= 0
= 1
Note: Bits 6 & 7 do not affect the parallel port FDC
pins.
Bit[0] Forced Write Protect 0
= 0
= 1
Bit[1] Reserved
Bits[3:2] Density Select
= 00
= 01
= 10
= 11
Bit[7:4] Reserved.
nWRTPRT (to the FDC Core) = (nDS0 AND FORCE
WRTPRT) OR nWRTPRT (from the FDD Interface)
Note: Boot floppy is always drive 0.
Note: the Force Write Protect 0 bit also applies to the
Parallel Port FDC.
= 0
= 1
the drive has been selected.
Inactive (default)
FDD nWRTPRT input is forced active when
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 OD24 open drain (default)
FDC outputs are O24 push-pull
FDC outputs active (default)
FDC outputs tri-stated
Normal (default)
Normal (reserved for users)
1 (forced to logic "1")
0 (forced to logic "0")
144
DEFINITION
STATE
C
C