STK14C88-NF35U Datasheet, PDF (8/15 Pages) Simtek Corporation – 32Kx8 AutoStore nvSRAM with extended temperature

STK14C88-NF35U
SOFTWARE STORE/RECALL MODE SELECTION
E
W
L
H
L
H
A₁₃ - A₀ (hex)
0E38
31C7
03E0
3C1F
303F
0FC0
0E38
31C7
03E0
3C1F
303F
0C63
MODE
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Nonvolatile STORE
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Nonvolatile RECALL
I/O
Output Data
Output Data
Output Data
Output Data
Output Data
Output High Z
Output Data
Output Data
Output Data
Output Data
Output Data
Output High Z
POWER
Active
l_CC2
Active
NOTES
n, r, s, t
n, r, s, t
SOFTWARE-CONTROLLED STORE/RECALL CYCLE^v
(V_CC = 5.0V ± 10%)^e
SYMBOLS
NO.
Standard
Alternate
PARAMETER
STK14C88-NF35U
MIN
MAX
UNITS
NOTES
33
t_AVAV
t_RC
34
t_AVEL
t_AS
35
t_ELEH
t_CW
36
t_ELAX
37
t_RECALL
STORE/RECALL Initiation Cycle Time
Address Set-up Time
Clock Pulse Width
Address Hold Time
RECALL Duration
35
ns
n
0
ns
u,v
25
ns
u,v
20
ns
u, v
20
μs
Note r:
Note s:
Note t:
Note u:
Note v:
The six consecutive addresses must be in the order listed. W must be high during all six consecutive E or G controlled cycles to enable a non-
volatile cycle.
While there are 15 addresses on the STK14C88-NF35U, only the lower 14 are used to control software modes.
I/O state assumes G < V_IL. Activation of nonvolatile cycles does not depend on state of G.
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.
The six consecutive addresses must be read 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 consecu-
tive cycles.
SOFTWARE STORE/RECALL CYCLE: E CONTROLLED^v
ADDRESS
33
t_AVAV
ADDRESS #1
33
t_AVAV
ADDRESS #6
34
t_AVEL
35
t_ELEH
E
DQ (DATA
36
t_ELAX
DATA VALID
/ ²⁸
37
t_STORE t_RECALL
DATA VALID
HIGH IMPEDANCE
Document Control #ML0066 Rev 2.0
8
Feb, 2008