FDD Interface Pins
Pins used for local logic control or part
programming are unaffected. Table 49 depicts
the state of the floppy disk drive interface pins in
the powerdown state.
All pins in the FDD interface which can be
connected directly to the floppy disk drive itself
are either DISABLED or TRISTATED.
Table 49 - State of Floppy Disk Drive Interface Pins in Powerdown
FDD PINS
STATE IN AUTO POWERDOWN
Input Pins
Input
RDATA
WP
Input
TRK0
Input
INDX
Input
DRV2
DSKCHG
Input
Input
Output Pins
Tristated
Tristated
Active
MOTEN[0:3]
DS[0:3]
DIR
STEP
Active
WRDATA
WE
Tristated
Tristated
Active
HDSEL
DENSEL
DRATE[0:1]
Active
Active
114