AT45D011-SI Atmel, AT45D011-SI Datasheet - Page 18

• Manufacturer Part Number: AT45D011-SI
• Description: IC FLASH 1MBIT 15MHZ 8SOIC
• Manufacturer: Atmel

Specifications of AT45D011-SI

• Format - Memory: FLASH
• Memory Type: DataFLASH
• Memory Size: 1M (512 pages x 264 bytes)
• Speed: 15MHz
• Interface: SPI, 3-Wire Serial
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-SOIC (5.3mm Width), 8-SOP, 8-SOEIAJ
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: AT45D011SI

Figure 2. Algorithm for Randomly Modifying Data
Notes:
Sector Addressing
18
PA8
0
0
1
1. To preserve data integrity, each page of a DataFlash sector must be updated/rewritten at least once within every 10,000
2. A Page Address Pointer must be maintained to indicate which page is to be rewritten. The Auto Page Rewrite command
3. Other algorithms can be used to rewrite portions of the Flash array. Low power applications may choose to wait until 10,000
cumulative page erase/program operations within that sector.
must use the address specified by the Page Address Pointer.
cumulative page erase/program operations have accumulated before rewriting all pages of the sector. See application note
AN-4 (“Using Atmel’s Serial DataFlash”) for more details.
PA7
X
X
0
AT45D011
MAIN MEMORY PAGE PROGRAM
PA6
X
X
0
(82H)
PA5
to BUFFER TRANSFER
ADDRESS POINTER
X
X
0
MAIN MEMORY PAGE
Auto Page Rewrite
INCREMENT PAGE
START
(53H)
(58H)
END
provide address of
page to modify
PA4
MEMORY PAGE PROGRAM
(2)
X
X
0
(2)
BUFFER to MAIN
BUFFER WRITE
(84H)
(83H)
If planning to modify multiple
bytes currently stored within
a page of the Flash array
PA3
X
X
0
PA2-PA0
X
X
X
Sector
0
1
2