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ACE25AC400GL Datasheet(PDF) 5 Page - ACE Technology Co., LTD.

Part # ACE25AC400GL
Description  SPI NOR FLASH
Download  23 Pages
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Manufacturer  ACE [ACE Technology Co., LTD.]
Direct Link  http://www.ace-ele.com
Logo ACE - ACE Technology Co., LTD.

ACE25AC400GL Datasheet(HTML) 5 Page - ACE Technology Co., LTD.

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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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