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SEMA ELECTRONICS CO.,LTD
FLOPPY DISK DRIVE SPECIFICATION
PAG E 27
MODEL
SFD-321B
9. OPTION SELECTION
FDD can be modified for different functions than the standard specification.
These modifications should be implemented by the factory according to the
request of the customers.
9.1 Trace Options
By putting a chip-resisto r on to a p roper trace , FDD can be used for the
following different functions.
Trace Name Description
DS0
DS1
Activate Drive Select 0 line
Activate Drive Select 1 line
DC
RDY
Activate Disk Change Signal
Activate Ready Signal
OPA
OPB (*1)
For 3 Mode usage
For 1.6MB usage
<Note>
(*1) Both "OPA" and "O PB" o pen : 2 Mode (1MB / 2MB)
"OPB" is connected and "OPA" is open : 2 Mode (1MB / 1.6MB)
"OPA" is connected and "OPB" is open : 3 Mode (1MB / 1.6MB / 2MB)