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ACE25AC400GL Datasheet(PDF) 5 Page - ACE Technology Co., LTD. |
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ACE25AC400GL Datasheet(HTML) 5 Page - ACE Technology Co., LTD. |
5 / 23 page ACE25AC400GL SPI NOR FLASH VER 1.1 5 Status Register S7 S6 S5 S4 S3 S2 S1 S0 SRWD Reserved Reserved BP2 BP1 BP0 WEL WIP The status and control bits of the Status Register are as follows: WIP bit. The Write In Progress (WIP) bit indicates whether the memory is busy in program/erase/write status register progress. When WIP bit sets to 1, the device is busy in program/erase/write status register progress. When WIP bit sets 0, the device is not in program, erase or write status register. WEL bit. The Write Enable Latch (WEL) bit indicates the status of the internal Write Enable Latch. When set to 1, the internal Write Enable Latch is set. When set to 0, the internal Write Enable Latch is reset and no Write Status Register, Program or Erase command is accepted. BP2, BP1, BP0 bits. The Block Protect (BP2, BP1, BP0) bits are non-volatile. They define the size of the area to be software protected against Program and Erase commands. These bits are written with the Write Status Register (WRSR) command. When the Block Protect (BP2, BP1, BP0) bits are set to 1, the relevant memory area (as defined in Table1) becomes protected against Page Program (PP), Sector Erase (SE) and Block Erase (BE) commands. Chip Erase command will be ignored if one or more of the Block Protect (BP2, BP1, BP0) bits are 1. SRWD bit. The Status Register Write Disable (SRWD) bit is a non-volatile One Time Program (OTP) bit in the status register that provide another software protection. Once it is set to 1, the Write Status Register (WRSR) instruction is no longer accepted and the SRWD bit and Block Protect bits (BP2, BP1, BP0) are read only. SRWD Status register Memory 0 Status register can be written in (WEL bit is set to "1") and the SRWD, BP2-BP0 bits can be changed The protected area cannot be program or erase 1 The SRWD, BP2-BP0 of status register bits cannot be changed The protected area cannot be program or erase |
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