STK12C68
AutoStore™/POWER-UP RECALL
(VCC = 5.0V ± 10%)e
SYMBOLS
STK12C68
NO.
PARAMETER
UNITS NOTES
Standard
Alternate
MIN
MAX
550
10
27
28
29
30
31
32
t
t
t
t
Power-up RECALL Duration
STORE Cycle Duration
µs
ms
ns
µs
V
s
RESTORE
STORE
VSBL
t
t
p, q, t
HLHZ
BLQZ
Low Voltage Trigger (V
) to HSB Low
300
l
SWITCH
Time Allowed to Complete SRAM Cycle
Low Voltage Trigger Level
1
p
DELAY
V
V
4.0
4.5
3.9
SWITCH
RESET
Low Voltage Reset Level
V
Note s: tRESTORE starts from the time VCC rises above VSWITCH
.
Note t: HSB is asserted low for 1µs when VCAP 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
V
CC
31
V
SWITCH
32
V
RESET
TM
AutoStore
POWER-UP RECALL
29
28
27
t
VSBL
t
t
STORE
RESTORE
HSB
30
t
DELAY
W
DQ (DATA OUT)
POWER-UP
RECALL
BROWN OUT
NO STORE
(NO SRAM WRITES)
BROWN OUT
AutoStore™
BROWN OUT
AutoStore™
NO RECALL
NO RECALL
RECALL WHEN
(V DID NOT GO
(V DID NOT GO
V
RETURNS
CC
CC
CC
BELOW V
)
BELOW V
)
ABOVE V
SWITCH
RESET
RESET
October 2003
6
Document Control # ML0008 rev 0.4