The GD25B256E provide the following data protection methods: ◆ Write Enable (WREN) command: The WREN command is set the Write Enable Latch bit (WEL). The WEL bit will return to reset by the following situation: -Power-Up / Software Reset (66H+99H) -Write Disable (WRDI) -Write Status Register (WRSR) -Page Program (PP) -Sector Erase (SE) / Block Erase (BE) / Chip Erase (CE) ◆ Software Protection Mode: The Block Protect bits (BP4-BP0) define the section of the memory array that can be read but not changed. ◆ Deep Power-Down Mode: In Deep Power-Down Mode, all commands are ignored except the Release from Deep Power-Down Mode command and Software Reset (66H+99H). ◆ Write Inhibit Voltage (VWI): Device would reset automatically when VCC is below a certain threshold VWI.
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