Slow-Step (Single-Track); Figure 12 General Step Timing; Figure 13: Slow-Step Timing - Seagate ST212 Product Manual

1
6Smsec avg. _
1
r---170msec max. - - - ,
I-
SJLsec min.
SOOJLsec max.
100nsec min.
-STEP
- DIRECTION IN
(p?1' f f11
E :
?A
S_TA_B_L_E
VU
P?~·t f+~E ï//)
100nsecmin·--H-
-1
1-2~~~~
-I1-100nsecmin.
1J
- DRIVE SELECT
1 1
- - - - -
- SEEK COMPLETE
FIGURE 12:
General Step Timing
SLOW-STEP (Single-Track)
4.3.2
In Slow-Step, the stepper motor is settled and SEEK COMPLETE is issued 20
msec. max. after the leading edge of the last Step pulse.
FIGURE 13:
Slow-step Timing
- DRIVE SELECi
1
--l L......
100nsec min.
-J L......
1oonsec min.
- DIRECTION IN
Il - Il.,.,.,,.,.,.,.,,.,...-...
-~,.,.,.,.,..,.,.,..,.
~;6M+'<~R~?J
V///// / /ffippe
T ,
911(1/ï)///lJ
_ STEP
--.J
j..-100nsec min.
~
1-
100nsec min.
U
Lrll
f f
La:~ ~.," "'""'~
'oo-""-Jf
1
- SEEK
COMPLETE'
-------------.,1.... _
ST212 PRODUCT MANUALIRev. B
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