DS1855 datasheet(5/20 Pages) DALLAS

部品番号	DS1855

部品情報	Dual Nonvolatile Digital Potentiometer and Secure Memory

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メーカー	DALLAS [Dallas Semiconductor]

ホームページ	https://www.maximintegrated.com/en.html

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DS1855

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FBh – FCh

Lock Bytes

Writing to these two bytes allows the user to lock or unlock the

memory described in byte FAh.

LOCK: If memory location FBh is written to 56h and memory

location FCh is written to 25h, the device will enter lock mode.

Write protection will become active in the memory locations that

are specified in FAh.

UNLOCK: If memory location FBh is written to 67h and memory

location FCh is written to 36h, the device will be unlocked. Once

unlocked, the user can change the setting of memory location FAh

to affect the EEPROM write-protection.

The locking can be updated at any time as long as the upper

page is unlocked.

FD – FFh

Reserved

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