STK22C48 데이터 시트보기 (PDF) - Cypress Semiconductor
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STK22C48 Datasheet PDF : 14 Pages
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STK22C48
AutoStore or Power Up RECALL
Parameter
tHRECALL [12]
tSTORE [14, 15]
tDELAY [13]
VSWITCH
VRESET
tVSBL[10]
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
Low Voltage Trigger (VSWITCH) to HSB Low
STK22C48
Min
Max
550
10
1
4.0
4.5
3.6
300
Unit
μs
ms
μs
V
V
ns
Switching Waveform
Figure 11. AutoStore/Power Up RECALL
WE
Notes
12. tHRECALL starts from the time VCC rises above VSWITCH.
13. CE and OE low for output behavior.
14. CE and OE low and WE high for output behavior.
15. 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: 001-51000 Rev. **
Page 10 of 14
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