U632H64
PowerStore
and automatic Power Up RECALL
V
CAP
5.0 V
V
SWITCH
t
PowerStore
t
PDSTOREp
(24)
(24)
Power Up
RECALL
W
DQi
t
RESTOR
E
t
RESTORE
t
DELAYp
BROWN OUT
POWER UP BROWN OUT
NO STORE
PowerStore
RECALL
(NO S RAM WRITES)
Hardware Controlled STORE
HSB
DQi
t
w(H)Sq
(28)
t
dis(H)S
(26)
Previous Data Valid
t
en(H)S
(27)
High Impedance
t
d(H)S
(25)
Output
Data Valid
Software Controlled STORE/
No.
RECALL Cycle
29 STORE/RECALL Initiation Time
30 Chip Enable to Output Inactive
s
31 STORE Cycle Time
32 RECALL Cycle Time
r
33 Address Setup to Chip Enable
34 Chip Enable Pulse Width
s, t
35 Chip Disable to Address Change
Symbol
Unit
Alt.
t
AVAV
t
ELQZ
t
ELQXS
t
ELQXR
t
AVELN
t
ELEHN
t
EHAXN
IEC
t
cR
t
dis(E)SR
t
d(E)S
t
d(E)R
t
su(A)SR
t
w(E)SR
t
h(A)SR
0
20
0
Min. Max.
25
600
10
20
ns
ns
ms
μs
ns
ns
ns
p: t
PDSTORE
approximate t
d(E)S
or t
d(H)S
; t
DELAY
approximate t
dis(H)S
.
q: After t
w(H)S
HSB is hold down internal by STORE operation.
r: An automatic RECALL also takes place at power up, starting when V
CC
exceeds V
SWITCH
and takes t
RESTORE
. V
CC
must not drop below
V
SWITCH
once it has been exceeded for the RECALL to function properly.
s: Once the software controlled STORE or RECALL cycle is initiated, it completes automatically, ignoring all inputs.
t: Noise on the E pin may trigger multiple READ cycles from the same address and abort the address sequence.
STK Control #ML0047
8
Rev 1.1
August 15, 2006
SIMTEK [ SIMTEK CORPORATION ]
