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STK14EC16-BF15I Datasheet(PDF) 8 Page - Simtek Corporation |
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STK14EC16-BF15I Datasheet(HTML) 8 Page - Simtek Corporation |
8 / 21 page 8 Simtek Confidential Jan, 2008 Document Control #ML0061 Rev 1.1 STK14EC16 Preliminary SRAM WRITE CYCLE #3: LB, UB Controlledg,h AutoStore™/POWER-UP RECALL Note i: tHRECALL starts from the time VCC rises above VSWITCH Note j: If an SRAM WRITE has not taken place since the last nonvolatile cycle, no STORE will take place AutoStore™/POWER-UP RECALL NO. SYMBOLS PARAMETER STK14EC16 UNITS NOTES Standard Alternate MIN MAX 26 tHRECALL Power-up RECALL Duration 20 ms i 27 tSTORE tHLHZ STORE Cycle Duration 12.5 ms j 28 VSWITCH Low Voltage Trigger Level 2.65 V 29 VCCRISE VCC Rise Time 150 μs Input Data Valid t AVBL t BHDX Address E W Data Input Data Output t AVAV t BLBH t BHAX t WLBH t DVBH High Impedance Address Valid t ELBH LB , UB (15) (22) (17) (23) (18) (16) (19) (20) t AVBH (21) tSTORE (27) VCC VSWITCH (28) tVCCRISE (29) tSTORE (27) AutoStore POWER-UP RECALL tHRECALL (26) tHRECALL (26) Read & Write Inhibited POWER-UP RECALL Read & Write BROWN OUT AutoStore POWER-UP RECALL Read & Write POWER DOWN AutoStore ** ** Note: Read and Write cycles will be ignored during STORE, RECALL and while VCC is below VSWITCH ** AutoStore occures only if at least one SRAM Write has happened |
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