FDC37B77X SMSC Corporation, FDC37B77X Datasheet - Page 110

• Manufacturer Part Number: FDC37B77X
• Description: ENHANCED SUPER I/O CONTROLLER WITH WAKE UP FEATURES
• Manufacturer: SMSC Corporation

FDD Interface Pins
All pins in the FDD interface which can be
connected directly to the floppy disk drive itself
are either DISABLED or TRISTATED.
Table 46 - State of Floppy Disk Drive Interface Pins in Powerdown
DRVDEN[0:1]
nDSKCHG
FDD PINS
nWPROT
nWDATA
nWGATE
nRDATA
nHDSEL
nINDEX
nMTR0
nSTEP
nTR0
nDS0
nDIR
OUTPUT PINS
INPUT PINS
STATE IN AUTO POWERDOWN
110
Pins used for local logic control or part
programming are unaffected. Table 46 depicts
the state of the floppy disk drive interface pins in
the powerdown state.
Tristated
Tristated
Tristated
Tristated
Active
Active
Active
Active
Input
Input
Input
Input
Input