Cypress STK12C68-5 AutoStore or Power Up RECALL, Switching Waveform

STK12C68-5 (SMD5962-94599)
Document Number: 001-51026 Rev. ** Page 11 of 18
AutoStore or Power Up RECALL
Parameter Alt Description STK12C68-5 Unit
Min Max
tHRECALL [13] tRESTORE Power up RECALL Duration 550 μs
tSTORE [14, 15, 16] tHLHZ STORE Cycle Duration 10 ms
tDELAY [9, 15] tHLQZ , tBLQZ Time Allowed to Complete SRAM Cycle 1 μs
VSWITCH Low Voltage Trigger Level 4.0 4.5 V
VRESET Low Voltage Reset Level 3.9 V
tVCCRISE VCC Rise Time 150 μs
tVSBL[11] Low Voltage Trigger (VSWITCH) to HSB Low 300 ns
Switching Waveform
Figure 12. 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.
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