WRIIE GAIE
input
signal
(lDterDal) WRITE GATE
Erase
gate
sigaal
SIDE ONE SELECI
WRItE DAtA
input
sigDal
Data latch output
Write
driver outplt
Hagoatization of disk
--,
i
J;J/7~~:=I//J/////#ql/jt-----+-r-
Erase off
delay
. Wrlte
driver area of
operatlOD .
.
iw»n»»,""",""
b»»m;m;mmm%VZ1
_ _ -JV///'
Erase driver area of operation
'///.11..-
- . - - - - -
- - + - - - - - - - , -
- - . 1 . - - - - - - - - I I - - - - - - - - - - - - L -
%I-I-I~I-I-I-I-t3-1-~
Previous -.petization
Figure 3-5 Typical Write Circuit Waveforms
Low Voltage Detection circuits are provided to sense low and unstable DC
voltages.
The output of the low voltage detection circuits prevent the disk drive
from writing (or erasing) if the supplied voltage (+5 or +12 VDC) is low or
unstable.
These low voltage detection circuits are activated as follows:
+5 VDC circuit will activate if +5 VDC is at 3.6 to 4.0 volts.
+12 VDC circuit will activate if +12 VDC is at 9.2 to 8.2 volts.
TS-021-013087 ••• 01
3-7