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M59DR016D100ZB1T Datasheet(PDF) 10 Page - STMicroelectronics |
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M59DR016D100ZB1T Datasheet(HTML) 10 Page - STMicroelectronics |
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10 / 37 page  M59DR016C, M59DR016D 10/37 Bank Erase (BKE) Instruction. This instruction uses six write cycles and is used to erase all the blocks belonging to the selected bank. The Erase Set-up command 80h is written to address 555h on the third cycle after the two Coded cycles. The Bank Erase Confirm command 10h is similarly written on the sixth cycle after another two Coded cycles at an address within the selected bank. If the second command given is not an erase con- firm or if the Coded cycles are wrong, the instruc- tion aborts and the device is reset to Read Array. It is not necessary to program the array with 00h first as the P/E.C. will automatically do this before erasing it to FFh. Read operations within the same bank after the sixth rising edge of W or E output the Status Register bits. During the execution of the erase by the P/E.C., Data Polling bit DQ7 re- turns ’0’, then ’1’ on completion. The Toggle bit DQ6 toggles during erase operation and stops when erase is completed. After completion the Status Register bit DQ5 returns ’1’ if there has been an Erase Failure. Erase Suspend (ES) Instruction. In a dual bank memory the Erase Suspend instruction is used to read data within the bank where erase is in progress. It is also possible to program data in blocks not being erased. The Erase Suspend instruction consists of writing the command B0h without any specific address. No Coded Cycles are required. Erase suspend is accepted only during the Block Erase instruction execution. The Toggle bit DQ6 stops toggling when the P/E.C. is suspended within 15µs after the Erase Suspend (ES) command has been writ- ten. The device will then automatically be set to Read Memory Array mode. When erase is sus- pended, a Read from blocks being erased will out- put DQ2 toggling and DQ6 at '1'. A Read from a block not being erased returns valid data. During suspension the memory will respond only to the Erase Resume ER and the Program PG instruc- tions. A Program operation can be initiated during erase suspend in one of the blocks not being erased. It will result in DQ6 toggling when the data is being programmed. Erase Resume (ER) Instruction. If an Erase Suspend instruction was previously executed, the erase operation may be resumed by giving the command 30h, at an address within the bank be- ing erased and without any Coded Cycle. |
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