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Write protect features in SPI EEPROMs

Posted: 14 Oct 2008     Print Version  Bookmark and Share

Keywords:SPI  write protect  EEPROMs 

Data protection is a major concern in applications using EEPROMs. Even though serial EEPROMs offer a better protection against accidental writes than parallel EEPROMs, the corruption of data is still a possibility. In this application note, Denisa Stefan discusses Catalyst Semi's SPI (Serial Peripheral Interface) EEPROMs with write protect features that enhance data integrity.

The following software and hardware data protection features have been built into CAT25Cxxx device to prevent accidental writes to memory in noisy or poorly controlled environments.

  • • Hardware Write Protection (WP)
  • • Chip Select Requirements
  • • Software Write Protection of Memory Blocks
  • • Write Enable Latch and Write Enable Instruction
  • View the PDF document for more information.

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