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M28W320ECT85ZB6 Datasheet(PDF) 14 Page - STMicroelectronics |
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M28W320ECT85ZB6 Datasheet(HTML) 14 Page - STMicroelectronics |
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14 / 53 page  M28W320ECT, M28W320ECB 14/53 The lock status can be monitored for each block using the Read Electronic Signature command. Locked-Down blocks revert to the locked (and not locked-down) state when the device is reset on power-down. Table. 10 shows the protection sta- tus after issuing a Block Lock-Down command. Refer to the section, Block Locking, for a detailed explanation. Table 4. Commands Note: 1. X = Don’t Care, RA=Read Address, RD=Read Data, SRD=Status Register Data, ID=Identifier (Manufacture and Device Code), QA=Query Address, QD=Query Data, BA=Block Address, PA=Program Address, PD=Program Data, PRA=Protection Register Ad- dress, PRD=Protection Register Data. 2. The signature addresses are listed in Tables 5, 6 and 7. 3. Program Addresses 1 and 2 must be consecutive Addresses differing only for A0. 4. Program Addresses 1,2,3 and 4 must be consecutive Addresses differing only for A0 and A1. 5. 55h is reserved. 6. To be characterized. Commands Bus Write Operations 1st Cycle 2nd Cycle 3rd Cycle 4th Cycle 5th Cycle Op. Add Data Op. Add Data Op. Add Data Op. Add Data Op. Add Data Read Memory Array 1+ Write X FFh Read RA RD Read Status Register 1+ Write X 70h Read X SRD Read Electronic Signature 1+ Write X 90h Read SA(2) IDh Read CFI Query 1+ Write X 98h Read QA QD Erase 2 Write X 20h Write BA D0h Program 2 Write X 40h or 10h Write PA PD Double Word Program(3) 3 Write X 30h Write PA1 PD1 Write PA2 PD2 Quadruple Word Program(4) 5Write X 56h(6) Write PA1 PD1 Write PA2 PD2 Write PA3 PD3 Write PA4 PD4 Clear Status Register 1 Write X 50h Program/Erase Suspend 1Write X B0h Program/Erase Resume 1Write X D0h Block Lock 2 Write X 60h Write BA 01h Block Unlock 2 Write X 60h Write BA D0h Block Lock-Down 2 Write X 60h Write BA 2Fh Protection Register Program 2 Write X C0h Write PRA PRD |
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