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S29AL008D Datasheet(PDF) 24 Page - SPANSION |
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S29AL008D Datasheet(HTML) 24 Page - SPANSION |
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24 / 55 page  24 S29AL008D S29AL008D_00A3 June 16, 2005 Da t a S h ee t Sector Erase time-out immediately terminates the time-out period and suspends the erase operation. Addresses are don’t-cares when writing the Erase Suspend command. When the Erase Suspend command is written during a sector erase operation, the device requires a maximum of 20 µs to suspend the erase operation. However, when the Erase Suspend command is written during the sector erase time-out, the device immediately terminates the time-out period and suspends the erase operation. After the erase operation is suspended, the system can read array data from or program data to any sector not selected for erasure. (The device erase suspends all sectors selected for erasure.) Normal read and write timings and command definitions apply. Reading at any address within erase-suspended sectors pro- duces status data on DQ7–DQ0. The system can use DQ7, or DQ6 and DQ2 together, to determine if a sector is actively erasing or is erase-suspended. See Write Operation Status, on page 27 for information on these status bits. After an erase-suspended program operation is complete, the system can once again read array data within non-suspended sectors. The system can determine the status of the program operation using the DQ7 or DQ6 status bits, just as in the standard program operation. See Write Operation Status, on page 27 for more information. The system may also write the autoselect command sequence when the device is in the Erase Suspend mode. The device allows reading autoselect codes even at addresses within erasing sectors, since the codes are not stored in the memory array. When the device exits the autoselect mode, the device reverts to the Erase Suspend mode, and is ready for another valid operation. See Autoselect Com- mand Sequence, on page 20 for more information. The system must write the Erase Resume command (address bits are don’t care) to exit the erase suspend mode and continue the sector erase operation. Further writes of the Resume command are ignored. Another Erase Suspend command can be written after the device resumes erasing. |
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