A d v a n c e
I n f o r m a t i o n
mode. Subsequent writes are ignored until V
CC
is greater than V
LKO
. The system
must provide the proper signals to the control pins to prevent unintentional writes
when V
CC
is greater than V
LKO
.
Write Pulse “Glitch” Protection
Noise pulses of less than 3 ns (typical) on OE#, CE# or WE# do not initiate a write
cycle.
Logical Inhibit
Write cycles are inhibited by holding any one of OE# = V
IL
, CE# = V
IH
or WE# =
V
IH
. To initiate a write cycle, CE# and WE# must be a logical zero while OE# is a
logical one.
Power-Up Write Inhibit
If WE# = CE# = V
IL
and OE# = V
IH
during power up, the device does not accept
commands on the rising edge of WE#. The internal state machine is automatically
reset to the read mode on power-up.
38
S29GLxxxA MirrorBit™ Flash Family
S29GLxxxA_00_A2 January 28, 2005
SPANSION [ SPANSION ]
