NEC FD1165 - Access; Write

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