STK15C88-W45I データシートの表示（PDF） - Simtek Corporation
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STK15C88-W45I
Simtek Corporation
STK15C88-W45I Datasheet PDF : 9 Pages
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STK15C88
SOFTWARE MODE SELECTION
E
W
L
H
A13 - A0 (hex)
0E38
31C7
03E0
3C1F
303F
0FC0
MODE
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Nonvolatile STORE
I/O
Output data
Output data
Output data
Output data
Output data
Output high Z
NOTES
l,m
0E38
Read SRAM
Output data
31C7
Read SRAM
Output data
03E0
Read SRAM
Output data
L
H
3C1F
Read SRAM
Output data
l,m
303F
Read SRAM
Output data
0C63
NonvolatileRECALL
Output high Z
Note l: The six consecutive addresses must be in order listed. W must be high during all six consecutive cycles to enable a nonvolatile cycle.
Note m: While there are 15 addresses on the STK15C88, only the lower 14 are used to control software modes.
SOFTWARE CYCLES #1 & #2n,o
(VCC = 5.0V ± 10%)
SYMBOLS
NO.
#1
PARAMETER
STK15C88-25
MIN
MAX
STK15C88-35
MIN
MAX
STK15C88-45
MIN
MAX
UNITS
27
tAVAV
28
tELQZg,n
29
tAVELn
30
tELEHn
31
tELAXg,n
32
tRECALL
STORE/RECALL initiation cycle time
End of Sequence to Outputs Inactive
Address Set-up Time
Clock Pulse Width
Address Hold Time
Recall Duration
25
35
45
ns
650
650
650
ns
0
0
0
ns
20
25
30
ns
20
20
20
ns
20
20
20
µs
Note n: The software sequence is clocked with E controlled reads.
Note o: The six consecutive addresses must be in the order listed in the SOFTWARE 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 CYCLE: E CONTROLLED
ADDRESS
t
29
AVEL
t
27
AVAV
ADDRESS #1
t
30
ELEH
E
31
t ELAX
DQ(Data Out)
DATA VALID
t
27
AVAV
ADDRESS #6
t
23
STORE
t
32
RECALL
t
28
ELQZ
DATA VALID
HIGH IMPEDANCE
August 1998
5-40
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