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M28256-90WMS6T Datasheet(PDF) 6 Page - STMicroelectronics |
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M28256-90WMS6T Datasheet(HTML) 6 Page - STMicroelectronics |
6 / 21 page AI01698B WRITE AAh in Address 5555h WRITE 55h in Address 2AAAh WRITE A0h in Address 5555h SDP is set WRITE AAh in Address 5555h WRITE 55h in Address 2AAAh WRITE A0h in Address 5555h WRITE Data to be Written in any Address SDP ENABLE ALGORITHM Page Write Instruction Page Write Instruction WRITE is enabled SDP Set SDP not Set Write in Memory Write Data + SDP Set after tWC Figure 5. Software Data Protection Enable Algorithm and Memory Write AI01699B WRITE AAh in Address 5555h WRITE 55h in Address 2AAAh WRITE 80h in Address 5555h Unprotected State after tWC (Write Cycle time) WRITE AAh in Address 5555h WRITE 55h in Address 2AAAh WRITE 20h in Address 5555h Page Write Instruction Figure 6. Software Data Protection Disable Algorithm 6/21 M28256 |
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