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STK12C68-CF25I Datasheet(PDF) 7 Page - Simtek Corporation |
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STK12C68-CF25I Datasheet(HTML) 7 Page - Simtek Corporation |
7 / 20 page 7 STK12C68 (SMD5962-94599) February 2007 Document Control #ML0008 Rev 0.7 AutoStore / POWER-UP RECALL (VCC = 5.0V ± 10%)e 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 NO. SYMBOLS PARAMETER STK12C68 UNITS NOTES Standard Alternate MIN MAX 27 tRESTORE Power-up RECALL Duration 550 μs s 28 tSTORE tHLHZ STORE Cycle Duration 10 ms p, q, t 29 tVSBL Low Voltage Trigger (VSWITCH) to HSB Low 300 ns l 30 tDELAY tBLQZ Time Allowed to Complete SRAM Cycle 1 μs p 31 VSWITCH Low Voltage Trigger Level 4.0 4.5 V 32 VRESET Low Voltage Reset Level 3.9 V 30 tDELAY 29 tVSBL POWER-UP RECALL BROWN OUT NO STORE (NO SRAM WRITES) NO RECALL (VCC DID NOT GO BELOW VRESET) BROWN OUT AutoStore NO RECALL (VCC DID NOT GO BELOW VRESET) BROWN OUT AutoStore RECALL WHEN VCC RETURNS ABOVE VSWITCH AutoStoreTM HSB W DQ (DATA OUT) 28 tSTORE 27 tRESTORE POWER-UP RECALL 31 VSWITCH 32 VRESET VCC |
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