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M29F016B90N3T Datasheet(PDF) 8 Page - STMicroelectronics |
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M29F016B90N3T Datasheet(HTML) 8 Page - STMicroelectronics |
8 / 22 page M29F016B 8/22 Chip Erase Command. The Chip Erase com- mand can be used to erase the entire chip. Six Bus Write operations are required to issue the Chip Erase Command and start the Program/Erase Controller. If any blocks are protected then these are ignored and all the other blocks are erased. If all of the blocks are protected the Chip Erase operation ap- pears to start but will terminate within about 100 µs, leaving the data unchanged. No error condition is given when protected blocks are ignored. During the erase operation the memory will ignore all commands. It is not possible to issue any com- mand to abort the operation. Typical chip erase times are given in Table 6. All Bus Read opera- tions during the Chip Erase operation will output the Status Register on the Data Inputs/Outputs. See the section on the Status Register for more details. After the Chip Erase operation has completed the memory will return to the Read Mode, unless an error has occurred. When an error occurs the memory will continue to output the Status Regis- ter. A Read/Reset command must be issued to re- set the error condition and return to Read Mode. The Chip Erase Command sets all of the bits in un- protected blocks of the memory to ’1’. All previous data is lost. Block Erase Command. The Block Erase com- mand can be used to erase a list of one or more blocks. Six Bus Write operations are required to select the first block in the list. Each additional block in the list can be selected by repeating the sixth Bus Write operation using the address of the additional block. The Block Erase operation starts the Program/Erase Controller about 50 µs after the last Bus Write operation. Once the Program/Erase Controller starts it is not possible to select any more blocks. Each additional block must therefore be selected within 50 µs of the last block. The 50µs timer restarts when an additional block is selected. The Status Register can be read after the sixth Bus Write operation. See the Status Register for details on how to identify if the Program/Erase Controller has started the Block Erase operation. If any selected blocks are protected then these are ignored and all the other selected blocks are erased. If all of the selected blocks are protected the Block Erase operation appears to start but will terminate within about 100 µs, leaving the data un- changed. No error condition is given when protect- ed blocks are ignored. During the Block Erase operation the memory will ignore all commands except the Erase Suspend and Read/Reset commands. Typical block erase times are given in Table 6. All Bus Read opera- tions during the Block Erase operation will output the Status Register on the Data Inputs/Outputs. See the section on the Status Register for more details. After the Block Erase operation has completed the memory will return to the Read Mode, unless an error has occurred. When an error occurs the memory will continue to output the Status Regis- ter. A Read/Reset command must be issued to re- set the error condition and return to Read mode. The Block Erase Command sets all of the bits in the unprotected selected blocks to ’1’. All previous data in the selected blocks is lost. Erase Suspend Command. The Erase Suspend Command may be used to temporarily suspend a Block Erase operation and return the memory to Read mode. The command requires one Bus Write operation. Table 6. Program, Erase Times and Program, Erase Endurance Cycles (TA = 0 to 70 °C, –40 to 85 °C or –40 to 125 °C) Note: 1. TA =25°C, VCC =5V. Parameter Min Typ(1) Typical after 100k W/E Cycles(1) Max Unit Chip Erase (All bits in the memory set to ‘0’) 6 6 sec Chip Erase 16 16 70 sec Block Erase (64 Kbytes) 0.6 0.6 4 sec Program 8 8 150 µs Chip Program 18 18 70 sec Program/Erase Cycles (per Block) 100,000 cycles |
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