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STK14C88-M
April 1999
5-48
AutoStore™/POWER-UP RECALL
(VCC = 5.0V ± 10%)
e
Note s:
tRESTORE starts from the time VCC rises above VSWITCH.
Note t:
HSB is asserted low for 1
µs when V
CAP drops through VSWITCH. If an SRAM WRITE has not taken place since the last nonvolatile cycle, HSB
will be released and no
STORE will take place.
AutoStore™/POWER-UP RECALL
NO.
SYMBOLS
PARAMETER
STK14C88-M
UNITS
NOTES
Standard
Alternate
MIN
MAX
27
tRESTORE
Power-up
RECALL Duration
550
µss
28
tSTORE
tHLHZ
STORE Cycle Duration
10
ms
q, t
29
tVSBL
Low Voltage Trigger (VSWITCH) to HSB Low
300
ns
l
30
tDELAY
tBLQZ
Time Allowed to Complete SRAM Cycle
1
µsq
31
VSWITCH
Low Voltage Trigger Level
4.0
4.5
V
32
VRESET
Low Voltage Reset Level
3.9
V
30
tDELAY
29
tVSBL
POWER-UP
RECALL
BROWN OUT
NO STORE DUE TO
NO SRAM WRITES
NO
RECALL
(VCC DID NOT GO
BELOW VRESET)
BROWN OUT
AutoStore™
NO
RECALL
(VCC DID NOT GO
BELOW VRESET)
BROWN OUT
AutoStore™
RECALL WHEN
VCC RETURNS
ABOVE VSWITCH
AutoStore™
HSB
W
DQ (DATA OUT)
28
tSTORE
27
tRESTORE
POWER-UP
RECALL
31
VSWITCH
32
VRESET
VCC