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AT45DB641E датащи(PDF) 28 Page - Renesas Technology Corp

номер детали AT45DB641E
подробное описание детали  64-Mbit DataFlash (with Extra 2-Mbits), 1.7 V Minimum SPI Serial Flash Memory
PDF  78 Pages
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производитель  RENESAS [Renesas Technology Corp]
домашняя страница  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

AT45DB641E датащи(HTML) 28 Page - Renesas Technology Corp

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DS-AT45DB641E-027 Rev. O
Page 28
6/30/23
© 2023 Renesas Electronics
AT45DB641E Datasheet
8.1.1
Enable Sector Protection
Sectors specified for protection in the Sector Protection Register can be protected from program and erase
operations by issuing the Enable Sector Protection command. To enable the sector protection, a 4-byte command
sequence of 3Dh, 2Ah, 7Fh, and A9h must be clocked into the device. After the last bit of the opcode sequence
has been clocked in, the CS pin must be deasserted to enable the Sector Protection.
Figure 5. Enable Sector Protection
8.1.2
Disable Sector Protection
To disable the sector protection, a 4-byte command sequence of 3Dh, 2Ah, 7Fh, and 9Ah must be clocked into
the device. After the last bit of the opcode sequence has been clocked in, the CS pin must be deasserted to
disable the sector protection.
Figure 6. Disable Sector Protection
Table 6. Enable Sector Protection Command
Command
Byte 1
Byte 2
Byte 3
Byte 4
Enable Sector Protection
3Dh
2Ah
7Fh
A9h
Table 7. Disable Sector Protection Command
Command
Byte 1
Byte 2
Byte 3
Byte 4
Disable Sector Protection
3Dh
2Ah
7Fh
9Ah
3Dh
2Ah
7Fh
A9h
CS
Each transition represents eight bits
SI
3Dh
2Ah
7Fh
9Ah
CS
Each transition represents eight bits
SI



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