
Document Number: 001-52038 Rev. *D Page 9 of 21
AutoStore/Power up RECALL
NO.
Symbols
Parameter
STK14C88
Unit Notes
Standard Alt. Min Max
27 t
RESTORE
Power up RECALL duration – 550 s19
28 t
STORE
t
HLHZ
STORE cycle duration – 10 ms 17, 20
29 t
VSBL
Low voltage trigger (V
SWITCH
) to HSB
Low
– 300 ns 13
30 t
DELAY
t
BLQZ
Time allowed to complete SRAM cycle 1 – s17
31 V
SWITCH
Low voltage trigger level 4.0 4.5 V –
32 V
RESET
Low voltage reset level – 3.6 V –
Figure 9. AutoStore/POWER UP RECALL
31
t
DELAY
30
t
VSBL
POWER UP
RECALL
BROWN OUT
NO STORE
(NO SRAM Writes)
NO RECALL
(V
CC
DID NOT GO
BELOW V
RESET
)
BROWN OUT
AutoStore
NO RECALL
(V
CC
DID NOT GO
BELOW V
RESET
)
BROWN OUT
AutoStore
RECALL WHEN
V
CC
RETURNS
ABOVE V
SWITCH
AutoStore
HSB
W
29
t
STORE
28
t
RESTORE
POWER UP RECALL
31
V
SWITCH
27
V
RESET
V
CC
DQ (DATA OUT)
Notes
19. t
RESTORE
starts from the time V
CC
rises above V
SWITCH
.
20. HSB
is asserted low for 1s when V
CAP
drops through V
SWITCH
. If an SRAM write has not taken place since the last nonvolatile cycle, HSB is released and no STORE
takes place.
Not Recommended for New Designs
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