Regd Read lock in AT32UC3A3128s

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I am using Microcontroller AT32UC3A3128s having 128 KB Flash. I would like to know what is meaning of Read Lock ?

What exactly do we need to do for read lock implementation.

 

Thanks,

Amit

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What do you mean by "Read Lock" ?'
'Read Lock' of what ???., flash?, registers?, bus-access?, ???

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I mean Read lock of Flash.

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Having said that, I came across below as well.

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 It is possible to intentionally lock the contents of the flash memory, such that the contents cannot be read out*. You can do this by setting the lock bits of the AVR according to the values listed in the datasheet, and the lock bits cannot be reset except by erasing the whole device.
*There are known ways of getting around this, so please don’t consider lock bits sufficient defense if you are worried about someone stealing your code as a means of industrial espionage.

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There are 2 ways to set the 'Security Bit' to restrict what can be accessed.
1) Programatically : FLASHC 'Set Security Bit' command.
2) JTAG : Studio menu Tools -> Device Programming -> Security.