Access; Write - NEC FD1165 Maintenance Manual

3.6.4 Access
Figure 3-11 shows the required time relationships between
the Write Gate, Step, and Direction Select signals.
1ms
(MIN)
rsmS+18mS(MINI
DIRECTION SELECT ---------------_~
(DIR)
WRITE GATE (WGT)
1650
IJ,S
~L
" r....
1
1J,S
TO 2.5 ms
STEP (STP) - - - - - - .
NOTE: FOR THE DIRECTION SELECT SIGNAL TO CHANGE, THE
STEP PULSE INTERVAL MUST BE MORE THAN 18 ms.
Figure 3-11 Access Timing
3.6.5 Write
Figure 3-12 shows the required time relationships of con-
troller signals during a Write operation.
SIDE SELECT (SSL)
r--
4 ps (MAX)
---....t
~
4
IJ,S
(MAX)
WRITE DATA (WDT)
-----------LI1fl..I-
--mr--
HEAD LOAD (HDU
~ ~. ~
r--
50 ms
(MIN)-,
STEP (STP)
u--uu-------------------
--~,.....,I ~
18 ms (MINI
- { - I-
-I*-:O~,
~.
t-II ...
I ----l00~S(MIN)-
...
1
'~NJ
WRITE GATE (WGTl
---------l
I~----
~
Figure 3-12 Write Timing
3-11