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**                                                                    **
**         Application notes for Atmel FLASH memory devices           **
**                                                                    **
**                       (Informal Document)                          **
**                                                                    **
**  To find the application notes for your device search for the      **
**  'core' part name.  As an example using the AT49BV160 48 pin TSOP  **
**  you would search on '49BV160'                                     **
**                                                                    **
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17F040
------
17F040A
-------
17F080
------
17F080A
-------
17F16A
-------

Block limits are not supported for this device. The entire memory
array will be erased automatically during an erase operation.

This device has an electronically erasable array. When re-programming
this device, enable the "Erase before program" option.

This device has "Reset clock" flag. This option can be selected from the
Program Operation menu.

Depending on the conditions of this  flag set by the user, the data is
read/verified/programmed in the following format:
MSBit -> LSBit: "Reset clock" flag = Yes
LSBit -> MSBit: "Reset clock" flag = No(Default Setting)
NOTE: The "Reset clock" flag MUST be set for each operation
           you perform (Load/Verify/Program).  If the flag is not
           enabled then data either Programmed into the device or
           Loaded from the device will be in LSBit  -> MSBit format.

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25F512
-------
25F1024
--------
25F2048
---------

Four levels of "BLOCK PROTECT" can be implemented for these devices:

Security Fuse                 Corresponding
  Settings                Block Protect Addresses

 SF2     SF1       25F512        25F1024       25F2048
-------------      ------------  ------------  -----------
  0       0        None          None          None
  0       1        $0-FFFF       $18000-1FFFF  $30000-3FFFF
  1       0        $0-FFFF       $10000-1FFFF  $20000-3FFFF
  1       1        $0-FFFF       $00000-1FFFF  $0-3FFFF