FDC37B77X SMSC Corporation, FDC37B77X Datasheet - Page 147
FDC37B77X
Manufacturer Part Number
FDC37B77X
Description
ENHANCED SUPER I/O CONTROLLER WITH WAKE UP FEATURES
Manufacturer
SMSC Corporation
Datasheet
1.FDC37B77X.pdf
(196 pages)
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SMSC Defined Logical Device Configuration
Registers
The
FDD Mode Register
Default = 0x0E
on Vcc POR or
Reset_Drv
Table 59 - Floppy Disk Controller, Logical Device 0 [Logical Device Number = 0x00]
NAME
SMSC
Specific
REG INDEX
0xF0 R/W
Logical
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.
= 0
= 1
Device
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
147
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.
DEFINITION
STATE
C
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