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S29PL-J55BAI011 Datasheet(PDF) 51 Page - SPANSION |
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S29PL-J55BAI011 Datasheet(HTML) 51 Page - SPANSION |
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51 / 96 page ![]() September 22, 2006 S29PL-J_00_A9 S29PL-J 49 Da ta Sh e e t (Adv a n ce In f o r m ation) Figure 13.1 In-System Sector Protection/Sector Unprotection Algorithms Sector Protect: Write 60h to sector address with A7-A0 = 00000010 Set up sector address Wait 150 µs Verify Sector Protect: Write 40h to sector address with A7-A0 = 00000010 Read from sector address with A7-A0 = 00000010 START PLSCNT = 1 RESET# = VID Wait 1 μs First Write Cycle = 60h? Data = 01h? Remove VID from RESET# Write reset command Sector Protect complete Yes Yes No PLSCNT = 25? Yes Increment PLSCNT Temporary Sector Unprotect Mode No Sector Unprotect: Write 60h to sector address with A7-A0 = 01000010 Set up first sector address Wait 15 ms Verify Sector Unprotect: Write 40h to sector address with A7-A0 = 00000010 Read from sector address with A7-A0 = 00000010 START PLSCNT = 1 RESET# = VID Wait 1 μs Data = 00h? Last sector verified? Remove VID from RESET# Write reset command Sector Unprotect complete Yes No PLSCNT = 1000? Yes Increment PLSCNT Temporary Sector Unprotect Mode No All sectors protected? Yes 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 Set up next sector address No Yes No Yes No No Yes No Sector Protect Algorithm Sector Unprotect Algorithm First Write Cycle = 60h? Protect another sector? Reset PLSCNT = 1 Device failed Remove VID from RESET# Write reset command Sector Protect complete Device failed Remove VID from RESET# Write reset command Sector Protect complete |
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