FDD Interface Pins
used for local logic control or part programming are
unaffected. Table 47 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.
Pins
Table 45 - State of Floppy Disk Drive Interface Pins in Powerdown
FDD Pins
State in Auto Powerdown
Input Pins
RDATA
WP
Input
Input
Input
Input
Input
Input
TRK0
INDX
DRV2
DSKCHG
Output Pins
MOTEN[0:3]
DS[0:3}
DIR
Tristated
Tristated
Active
STEP
Active
WRDATA
WE
Tristated
Tristated
Active
HDSEL
DENSEL
DRATE[0:1]
Active
Active
111