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A82DL32X4T Datasheet(PDF) 22 Page - AMIC Technology |
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A82DL32X4T Datasheet(HTML) 22 Page - AMIC Technology |
22 / 60 page A82DL32x4T(U) Series PRELIMINARY (August, 2005, Version 0.0) 21 AMIC Technology, Corp. START PLSCNT=1 555/AA + 2AA/55 + 555/77 Wait 1 us First Write Cycle=60h? Set up sector address Sector Protect: Write 60h to sector address with A6=0, A1=1, A0=0 Wait 150 us Verify Sector Protect: Write 40h to sector address with A6=0, A1=1, A0=0 Read from sector address with A6=0, A1=1, A0=0 Data=01h?** Protect another sector? Write reset command Sector Protect complete Sector Protect Algorithm Temporary Sector Unprotect Mode Increment PLSCNT PLSCNT =25? Device failed No No No Yes Reset PLSCNT=1 Yes Yes No Protect all sectors: The indicated portion of the sector protect algorithm must be performed for all unprotected sectors prior to issuing the first sector unprotect address START PLSCNT=1 Wait 1 us First Write Cycle=60h? No Temporary Sector Unprotect Mode Yes No All sectors protected? Set up first sector address Sector Unprotect: Write 60h to sector address with A6=1, A1=1, A0=0 Wait 15 ms Verify Sector Unprotect : Write 40h to sector address with A6=1, A1=1, A0=0 Read from sector address with A6=1, A1=1, A0=0 Data=00h?** Last sector verified? Write reset Command Sector Unprotect complete Yes Yes Set up next sector address No Yes Yes Sector Unprotect Algorithm Increment PLSCNT PLSCNT= 1000? Device failed Yes No No Figure 2-2. Software Sector/Sector Block Protection and Unprotection Algorithms Note: The term “sector” in the figure applies to both sectors and sector blocks * No other command is allowed during this process ** Access time is 200ns-300ns 555/AA + 2AA/55 + 555/77 |
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