I'm pretty brand-new in microcontroller area. For my task, I had been informed to carry out a write/read functionality for composing/reading data from Display/EEPROM storage. I do a fast lookup and saw some terminologies like: 'Write security', 'Adobe flash web page', 'Protected adobe flash page'. What are these really indicate? When and why do we require these 'write protection' or ' protected flash web page' ?
Thanks,Bien
This micro-controller has 1KByte of EEPROM in the address range 0x4000 – 0x43ff. By default the data area is write protected and cannot be modified by the main program. The write protection is removed by using a key to unlock the EEPROM data area. The flash program area is similarly protected but we will only consider the data EEPROM area.
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1 Answer
Eeprom and flash and other roms are implemented with pages, blobs of bits that all erase in one action. You can generally only remove whole webpages at a period. Usually they erase to all ones, but some are the additional method around, for the erase to all one situation, you can believe of it this method the just way to 'write' ones is definitely to remove a web page, but you can compose zeros on a basically a bit by little bit foundation. (by writing a byte or whatever the smallest write will be and only modifying the zeros you want).
write protection indicates simply what it says, writing protecting the entire component, or fractions of the component or a web page by page time frame as per the style.
sometimes the write security uses hooks being taken higher or low or the hooks shield the capability to unlock items after being locked. again it is on a design by style, supplier by dealer foundation as to what features are there, and you just learn the docs and test.
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