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S29GL016A90BFER20 Datasheet(PDF) 54 Page - SPANSION |
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S29GL016A90BFER20 Datasheet(HTML) 54 Page - SPANSION |
54 / 89 page 52 S29GL-A MirrorBit™ Flash Family S29GL-A_00_A3 April 22, 2005 Advan ce In form ati o n Notes: 1.See Table 30 and Table 31 for program command sequence. 2.See the section on DQ3 for information on the sector erase timer. Figure 6. Erase Operation Erase Suspend/Erase Resume Commands The Erase Suspend command, B0h, allows the system to interrupt a sector erase operation and then read data from, or program data to, any sector not selected for erasure. This command is valid only during the sector erase operation, in- cluding the 50 µs time-out period during the sector erase command sequence. The Erase Suspend command is ignored if written during the chip erase opera- tion or Embedded Program algorithm. When the Erase Suspend command is written during the sector erase operation, the device requires a typical of 5 µs (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 device enters the erase-sus- pend-read mode. The system can read data from or program data to any sector not selected for erasure. (The device erase suspends all sectors selected for era- sure.) Reading at any address within erase-suspended sectors produces status information 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. Refer to Write Operation Status on page 56 for information on these status bits. START Write Erase Command Sequence (Notes 1, 2) Data Poll to Erasing Bank from System Data = FFh? No Yes Erasure Completed Embedded Erase algorithm in progress |
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