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SEMA ELECTRONICS CO.,LTD
FLOPPY DISK DRIVE SPECIFICATION
PAG E 21
MODEL
SFD-321B
5.4.5 Disk Change / Ready
By se lecting p roper trace p lugs, this signal line (pin #34) can be u sed for
Ready or Disk Change line.
-. Ready
This lin e be comes a ctive "L OW" when th e drive is selected, a d isk is
clampedandthespindlemotorisuptospeed.
(afte r counting at least two Ind ex pulses)
Otherwise this lin e goes logical "HIGH" level.
-. Disk Change
This line is active "LOW" unless disk is clamped a nd a Step pulse is
received when th e d rive is selecte d.
0. 5
Max
0.5
Max
inserted
ejected
DRIVE SELE CT
DISK IN
STEP
DISK
CHANGE