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AT45DB321C Datasheet(PDF) 12 Page - ATMEL Corporation

Part # AT45DB321C
Description  32-megabit 2.7 volt DataFlash
Download  40 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT45DB321C Datasheet(HTML) 12 Page - ATMEL Corporation

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3387L–DFLASH–6/06
AT45DB321C
6.3.4
Various Aspects About the Sector Protection Register
Due to the sharing of the internal circuitry, the contents of the buffer 1 will get modified during the
erase and programming of Sector Protection Register. If the device is powered down during
erasing or programming the sector protection register, then the contents of the Sector Protection
Register cannot be guaranteed. The Sector Protection Register can be erased or reprogrammed
with the sector protection enabled or disabled. Being able to reprogram the Sector Protection
Register with the sector protection enabled allows the user to temporarily disable the sector pro-
tection to an individual sector rather than disabling the sector protection completely.
The Sector Protection Register is subject to the same endurance characteristics as the main
memory array. Users are encouraged to carefully evaluate the number of times the Sector Pro-
tection Register will be modified during the course of the applications’ life cycle. If the application
requires that the Sector Protection Register be modified more than the specified endurance of
the DataFlash because the application needs to temporarily unprotect individual sectors (sector
protection remains enabled while the Sector Protection Register is reprogrammed), then the
application will need to limit this practice. Instead, a combination of temporarily unprotecting indi-
vidual sectors along with disabling sector protection completely will need to be implemented by
the application to ensure that the endurance limits of the device are not exceeded.


Similar Part No. - AT45DB321C_06

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ATMEL Corporation		 AT45DB321C-CC ATMEL-AT45DB321C-CC Datasheet
610Kb / 37P		 32 MEGABIT 2.7 VOLT DATAFLASH
AT45DB321C-CI ATMEL-AT45DB321C-CI Datasheet
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AT45DB321C-CNC ATMEL-AT45DB321C-CNC Datasheet
610Kb / 37P		 32 MEGABIT 2.7 VOLT DATAFLASH
AT45DB321C-CNU ATMEL-AT45DB321C-CNU Datasheet
610Kb / 37P		 32 MEGABIT 2.7 VOLT DATAFLASH
AT45DB321C-RC ATMEL-AT45DB321C-RC Datasheet
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Similar Description - AT45DB321C_06

ManufacturerPart #DatasheetDescription
logo
ATMEL Corporation		 AT45DB321 ATMEL-AT45DB321 Datasheet
154Kb / 20P		 32-Megabit 2.7-volt Only Serial DataFlash
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230Kb / 32P		 32-megabit 2.7-volt Only DataFlash
AT45DB321C ATMEL-AT45DB321C Datasheet
610Kb / 37P		 32 MEGABIT 2.7 VOLT DATAFLASH
AT45DB321D ATMEL-AT45DB321D_07 Datasheet
1Mb / 55P		 32-megabit 2.7-volt DataFlash
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1Mb / 52P		 2-megabit 2.7-volt DataFlash
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1Mb / 52P		 1-megabit 2.7-volt DataFlash
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786Kb / 37P		 32-megabit 2.7-volt Only Serial Firmware DataFlash Memory
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AT45DB321D ATMEL-AT45DB321D_09 Datasheet
1Mb / 57P		 32-megabit 2.7-volt DataFlash
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