Samsung Comprehensive Overview of SFD-321B Specifications and Timing Diagrams

FLOPPY DISK DRIVE SPECIFICATION	PAGE	22
	MODEL	SFD-321B

6.TIMING DIAGRAM

6.1Seek Operation Timing

DRIVE SELECT

DIRECTION									FORWARD
					REVERSE
SELECT			1	㎲ Min.					1 ㎲
500	㎱ Min.								Min.
						18 ㎳ Min. (*1)
STEP
										1 ㎲
		3 ㎳ Min.		2.8				Max.
							㎳		10 ㎲ Max. Min.

TRACK 00

6.2 Read / Write Operation Timing

								650 ㎲ Min.
MOTOR ON
	600 ㎳ Max.							650 ㎲ Min.
DRIVE SELECT
								0.3 ㎳ Max.
READY
STEP
								(*2)
DENSITY
SELECT	18 ms Min.		100	㎲ Min. (*3)				100 ㎲ Min. (*3)
								(*2)
READ DATA	0	Min.
			ms Min.					(*2)
		18
			100 ㎲ Min		(*3)
WRITE GATE
	0	Min.			8	㎲	Max.	8 ㎲ Max.
WRITE DATA

<Note>

(*1) Turn Around Time is 18 ms Min. when Direction is changed. (*2) 750㎲ Min. (including 100 ㎲ Side Select timing)

(*3) When spindle motor speed is changed (300 rpm ↔ 360 rpm) this value is 500 ms Min.

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