Seagate ST251 - Figure 4. Read;Write Timing; Typical Drive Timing

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