at45db041b ATMEL Corporation, at45db041b Datasheet - Page 9

• Manufacturer Part Number: at45db041b
• Description: At45db041b 4-megabit 2.5-volt Or 2.7-volt Dataflash
• Manufacturer: ATMEL Corporation

5.4
3443D–DFLSH–2/08
Operation Mode Summary
take place in a maximum time of t
part is busy.
If a sector is programmed or reprogrammed sequentially page-by-page, then the programming
algorithm shown in
page or several pages are programmed randomly in a sector, then the programming algorithm
shown in
updated/rewritten at least once within every 10,000 cumulative page erase/program operations
in that sector.
The modes described can be separated into two groups – modes which make use of the Flash
memory array (Group A) and modes which do not make use of the Flash memory array (Group
B).
Group A modes consist of:
Group B modes consist of:
If a Group A mode is in progress (not fully completed) then another mode in Group A should not
be started. However, during this time in which a Group A mode is in progress, modes in Group B
can be started.
This gives the Serial DataFlash the ability to virtually accommodate a continuous data stream.
While data is being programmed into main memory from buffer 1, data can be loaded into buffer
2 (or vice versa). See application note AN-4 (“Using Atmel’s Serial DataFlash”) for more details.
1. Main Memory Page Read
2. Main Memory Page to Buffer 1 (or 2) Transfer
3. Main Memory Page to Buffer 1 (or 2) Compare
4. Buffer 1 (or 2) to Main Memory Page Program with Built-in Erase
5. Buffer 1 (or 2) to Main Memory Page Program without Built-in Erase
6. Page Erase
7. Block Erase
8. Main Memory Page Program through Buffer
9. Auto Page Rewrite
1. Buffer 1 (or 2) Read
2. Buffer 1 (or 2) Write
3. Status Register Read
Figure 17-2
Figure 17-1
on
page 28
on
EP
page 27
. During this time, the status register will indicate that the
is recommended. Each page within a sector must be
is recommended. Otherwise, if multiple bytes in a
AT45DB041B
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