SEMA ELECTRONICS CO.,LTD
FLOPPY DISK DRIVE SPECIFICATION
PAGE 22
MODEL SFD-321B

6. TIMING DIAGRAM

6.1 Seek Operation Timing

6.2 Read / Write Operation Timing

REVERSE FORWARD
1㎲
Min.
1㎲
Min.
1㎲Min.
10 ㎲Max.
2.8 ㎳Max.
18 ㎳Min. (*1)
500 ㎱Min.
3㎳Min.
DRIVE SELECT
DIRECTION
SELECT
STEP
TRACK 00
<Note>
(*1) Turn Around Time is 18 ms Min. when Direction is changed.
(*2) 750㎲Min. (including100 ㎲Side Se lect timing)
(*3) When spindle motor speed is changed (300 rpm ↔360 rpm )
this valu e is 500 ms Min.
650 ㎲Min.
650 ㎲Min.
0.3 ㎳Max.
600 ㎳Max.
(*2)
MOTOR ON
DRIVE SELECT
READY
STEP
READ DATA
WRITE GATE
WRITE DATA
DENSITY
SELECT 100 ㎲Min.(*3)
(*2)
100 ㎲Min. (*3)
100 ㎲Min (*3)
18 ms Min.
0Min.
18 ms Min.
0Min. 8㎲Max.
(*2)
8㎲Max.