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STK22C48-N45I 데이터시트(PDF) 6 Page - Simtek Corporation |
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STK22C48-N45I 데이터시트(HTML) 6 Page - Simtek Corporation |
6 / 15 page 6 February 2007 Document Control #ML0004 Rev 0.3 STK22C48 HARDWARE MODE SELECTION Note m: HSB STORE operation occurs only if an SRAM write has been done since the last nonvolatile cycle. After the STORE (if any) completes, the part will go into standby mode, inhibiting all operations until HSB rises. Note n: I/O state assumes G < VIL. Activation of nonvolatile cycles does not depend on state of G. HARDWARE STORE CYCLE (VCC = 5.0V ± 10%) e Note o: E and G low for output behavior. Note p: E and G low and W high for output behavior. Note q: tRECOVER is only applicable after tSTORE is complete. HARDWARE STORE CYCLE E W HSB A12 - A0 (hex) MODE I/O POWER NOTES H X H X Not Selected Output High Z Standby L H H X Read SRAM Output Data Active n L L H X Write SRAM Input Data Active X X L X Nonvolatile STORE Output High Z lCC2 m NO. SYMBOLS PARAMETER STK22C48 UNITS NOTES Standard Alternate MIN MAX 22 tSTORE tHLHZ STORE Cycle Duration 10 ms i, o 23 tDELAY tHLQZ Time Allowed to Complete SRAM Cycle 1 μs i, p 24 tRECOVER tHHQX Hardware STORE High to Inhibit Off 700 ns o, q 25 tHLHX Hardware STORE Pulse Width 15 ns 26 tHLBL Hardware STORE Low to Store Busy 300 ns DATA VALID HSB (IN) DATA VALID 25 tHLHX 23 tDELAY 22 tSTORE 24 tRECOVER HSB (OUT) HIGH IMPEDANCE 26 tHLBL HIGH IMPEDANCE DQ (DATA OUT) |
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