STK12C68
AutoStore or Power Up RECALL
Parameter
tHRECALL [13]
tSTORE [14, 15, 16]
tDELAY [9, 15]
VSWITCH
VRESET
tVCCRISE
tVSBL[11]
Alt
tRESTORE
tHLHZ
tHLQZ , tBLQZ
Description
Power up RECALL Duration
STORE Cycle Duration
Time Allowed to Complete SRAM Cycle
Low Voltage Trigger Level
Low Voltage Reset Level
VCC Rise Time
Low Voltage Trigger (VSWITCH) to HSB Low
STK12C68
Min
Max
550
10
1
4.0
4.5
3.9
150
300
Unit
μs
ms
μs
V
V
μs
ns
Switching Waveform
Figure 11. AutoStore/Power Up RECALL
WE
Notes
13. tHRECALL starts from the time VCC rises above VSWITCH.
14. CE and OE low for output behavior.
15. CE and OE low and WE high for output behavior.
16. HSB is asserted low for 1us when VCAP drops through VSWITCH. If an SRAM Write has not taken place since the last nonvolatile cycle, HSB is released and no store
takes place.
Document Number: 001-51027 Rev. **
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