STK12C68-M Simtek, STK12C68-M Datasheet - Page 6

• Manufacturer Part Number: STK12C68-M
• Description: CMOS NV SRAM 8K X 8 AUTOSTORE NONVOLATILE STATIC RAM
• Manufacturer: Simtek

STK12C68-M
SOFTWARE STORE/RECALL CYCLE
Note p: Once the software STORE or RECALL cycle is initiated, it completes automatically, ignoring all inputs.
Note q: Noise on the E pin may trigger multiple read cycles from the same address and abort the address sequence.
Note r: If the Chip Enable Pulse Width is less than t
Note s: W must be HIGH when E is LOW during the address sequence in order to initiate a nonvolatile cycle. G may be either HIGH or LOW throughout.
Note t:
SOFTWARE STORE/RECALL CYCLE
NO.
28
29
30
31
32
DQ(Data Out)
ADDRESS
of the low pulse, however the STORE or RECALL will still be initiated.
Addresses #1 through #6 are found in the MODE SELECTION table. Address #6 determines whether the STK12C68-M performs a STORE or RECALL .
E must be used to clock in the address sequence for the Software STORE and RECALL cycles.
t
t
t
t
t
AVAV
ELQZ
AVELN
ELEHN
EHAXN
Std.
SYMBOLS
E
p
q,r
t
t
t
t
RC
AE
EP
EA
Alt.
t
AVELN
30
STORE/RECALL Initiation Cycle Time
Chip Enable to Output Inactive
Address Set-up to Chip Enable
Chip Enable Pulse Width
Chip Disable to Address Change
PARAMETER
t
ADDRESS #1
ELEHN
31
t
AVAV
28
VALID
ELQV
t
EHAXN
32
(see READ CYCLE #2) but greater than or equal to t
q,r,t
ADDRESS #2
4-58
t
AVAV
28
STK12C68-40M
MIN
35
25
0
0
MAX
ADDRESS #6
85
ELEHN
t
ELQZ
STK12C68-45M
29
MIN
45
35
0
0
, then the data may not be valid at the end
VALID
t
STORE
23
MAX
85
HIGH IMPEDANCE
t
RECALL
22
(V
STK12C68-55M
CC
MIN
55
45
0
0
= 5.0V
MAX
85
10%)
UNITS
ns
ns
ns
ns
ns
d