Typical Drive Timing; Figure 4. Read/Write Timing - Seagate ST251R Product Manual

1.13 TYPICAL DRIVE TIMING
This section detai Is typical 8T251 1251 R/277R ti mi ng. Refer to the
Seagate ST412 Interface Manual for a general treatment of drive tim-
ing.
FIGURE
4:
Read/Write Timing
- DRIVE SELECT
. ----------------------~(~(-----------------
.;}-
- HEAD SELECT
~----------------------~(~(----------------
))
H
J L
40 nsec. min. / 95 nsec. max,
8
j.lsec max.
I I
(Head Switching)
rum.n
+
MFM (RLL) VALID
..... ---------j((
READ DATA
-1
~
)} . . .
1
• WRITE GATE
200 nsec. --..--
(typ. bit cell)
~
8 IIsec, max,
(write/read
recovery)
~~
400 nsec. max.
H )
~
r-
50 -150 nsec,
+ MFM (RLL) WRITE DATA
n n n
-----"4~ UI~
:00 nsec.
I
r
(typ, bit celt)
1-14
ST251 1251 RI277R Product Manual, Rev.A