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MX66L1G45G Datasheet(PDF) 9 Page - Macronix International |
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MX66L1G45G Datasheet(HTML) 9 Page - Macronix International |
9 / 124 page 9 MX66L1G45G REV. 1.0, OCT. 01, 2014 P/N: PM2018 6. DATA PROTECTION During power transition, there may be some false system level signals which result in inadvertent erasure or programming. The device is designed to protect itself from these accidental write cycles. The state machine will be reset as standby mode automatically during power up. In addition, the control register architecture of the device constrains that the memory contents can only be changed after specific command sequences have completed successfully. In the following, there are several features to protect the system from the accidental write cycles during VCC power- up and power-down or from system noise. • Valid command length checking: The command length will be checked whether it is at byte base and completed on byte boundary. • Write Enable (WREN) command: WREN command is required to set the Write Enable Latch bit (WEL) before other command to change data. • Deep Power Down Mode: By entering deep power down mode, the flash device also is under protected from writing all commands except Release from deep power down mode command (RDP) and Read Electronic Signature command (RES), Erase/Program suspend command, Erase/Program resume command and softreset command. • Advanced Security Features: there are some protection and security features which protect content from inadvertent write and hostile access. |
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