SEMA ELECTRONICS CO.,LTD
FLOPPY DISK DRIVE SPECIFICATION
PAGE 19
MODEL SFD-321B
5.3.7 Write Gate
"LOW" level of this signal enables the write data to be written on the disk
provided that the drive is selected,disk used is not write protected and
seek op eration is comple ted.
When this signalchanges to "HIGH" level, the read or seek operation
becomes possible.
5.3.8 Side Select
This signal selects the side of Heads.
Logical "HIGH" level : the lower side (side 0) of Heads
"LOW " level : the upper side (side 1) of Heads
5.4 Output Signals
5.4.1 Index
This is a pu lse signal ou tput to indica te the start of the tra ck, and it
outputs at every revolution of the disk.
This outputsignal is activated when only the drive is in Ready state.
<Note>
(*1) The value in parenthsis is for 360 rpm (1.6MB Mode) rotation speed.
100 ㎲Min. 650 ㎲Min.
100 ㎲Min.
100 ㎲Min.
650 ㎲Min
valid
valid valid
valid
WRITE GATE
SIDE SELECT
READ DATA
1∼8ms
200±3ms
(166.7±2.5 ms)(*1)