STK15C88
SOFTWARE STORE/RECALL MODE SELECTION
E
W
A
- A (hex)
MODE
I/O
NOTES
13
0
0E38
31C7
03E0
3C1F
303F
0FC0
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Output Data
Output Data
Output Data
Output Data
Output Data
Output High Z
L
H
l, m
Nonvolatile STORE
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
L
H
l, m
Nonvolatile RECALL
Note l: The six consecutive addresses must be in the order listed. W must be high during all six consecutive E controlled cycles to enable a nonvola-
tile cycle.
Note m: While there are 15 addresses on the STK15C88, only the lower 14 are used to control software modes.
SOFTWARE STORE/RECALL CYCLEn, o
(VCC = 5.0V ± 10%)
STK15C88-25
STK15C88-45
NO.
SYMBOLS
PARAMETER
UNITS
MIN
25
0
MAX
MIN
45
0
MAX
26
27
28
29
30
t
t
t
t
t
STORE/RECALL Initiation Cycle Time
ns
ns
ns
ns
μs
AVAV
AVEL
n
n
Address Set-up Time
Clock Pulse Width
Address Hold Time
RECALL Duration
20
20
30
20
ELEH
g, n
ELAX
20
20
RECALL
Note n: 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 o: 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 Controlledo
26
tAVAV
26
tAVAV
ADDRESS #1
ADDRESS #6
ADDRESS
27
tAVEL
28
tELEH
E
29
tELAX
23
30
tSTORE / tRECALL
HIGH IMPEDANCE
DATA VALID
DATA VALID
DQ (DATA
Rev 2.0
Document Control #ML0016
Jan, 2008
7
SIMTEK [ SIMTEK CORPORATION ]
