XMEGAA_09 datasheet(21/445 Pages) ATMEL

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XMEGAA Datasheet(PDF) 21 Page - ATMEL Corporation

Part #	XMEGAA

Description	Interrupts and Programmable Multi-level Interrupt Controller

PDF	445 Pages

Scroll/Zoom	100%

Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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21 / 445 page

8077H–AVR–12/09

XMEGA A

The Lock bits are used to set protection level on the different flash sections. They are used to

block read and/or write access of the code. Lock bits can be written from en external program-

mer and from the application software to set a more strict protection level, but not to set a less

strict protection level. Chip erase is the only way to erase the lock bits. The lock bits are erased

after the rest of the flash memory is erased.

An unprogrammed fuse or lock bit will have the value one, while a programmed flash or lock bit

will have the value zero.

Both fuses and lock bits are reprogrammable like the Flash Program memory.

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