STK14C88
SOFTWARE STORE/RECALL MODE SELECTION
E
W
A
- A (hex)
0
MODE
I/O
POWER
NOTES
13
0E38
31C7
03E0
3C1F
303F
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Output Data
Output Data
Output Data
Output Data
Output Data
L
H
Active
n, r, s, t
0FC0
Nonvolatile STORE
Output High Z
I
CC2
0E38
31C7
03E0
3C1F
303F
0C63
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Output Data
Output Data
Output Data
Output Data
Output Data
Output High Z
n, r, s, t
L
H
Active
Nonvolatile RECALL
SOFTWARE-CONTROLLED STORE/RECALL CYCLEv
(VCC = 5.0V ± 10%)e
SYMBOLS
STK14C88-25 STK14C88-35 STK14C88-45
NO.
PARAMETER
UNITS NOTES
Standard Alternate
MIN
25
0
MAX
MIN
35
0
MAX
MIN
45
0
MAX
33
34
35
36
37
tAVAV
tRC
tAS
tCW
STORE/RECALL Initiation Cycle Time
Address Set-up Time
Clock Pulse Width
ns
ns
ns
ns
μs
n
tAVEL
u,v
u,v
u, v
tELEH
tELAX
tRECALL
20
20
25
20
30
20
Address Hold Time
RECALL Duration
20
20
20
Note r: The six consecutive addresses must be in the order listed. W must be high during all six consecutive E controlled cycles to enable a nonvolatile
cycle.
Note s: While there are 15 addresses on the STK14C88, only the lower 14 are used to control software modes.
Note t: I/O state assumes G < VIL. Activation of nonvolatile cycles does not depend on state of G.
Note u: The software sequence is clocked on the falling edge of E controlled READs without involving G (double clocking will abort the sequence). See
application note: MA0002 http://www.simtek.com/attachments/appNote02.pdf.
Note v: The six consecutive addresses must be in the order listed in the Software STORE/RECALL Mode Selection Table: (0E38, 31C7, 03E0, 3C1F,
303F, 0FC0) for a STORE cycle or (0E38, 31C7, 03E0, 3C1F, 303F, 0C63) for a RECALL cycle. W must be high during all six consecutive
cycles.
SOFTWARE STORE/RECALL CYCLE: E CONTROLLEDv
33
tAVAV
33
tAVAV
ADDRESS #1
ADDRESS #6
ADDRESS
34
tAVEL
35
tELEH
E
36
tELAX
28
37
tSTORE / tRECALL
HIGH IMPEDANCE
DATA VALID
DATA VALID
DQ (DATA
Rev 2.0
Document Control #ML0014
Feb, 2008
8
SIMTEK [ SIMTEK CORPORATION ]
