AT45DB161-CI Atmel, AT45DB161-CI Datasheet - Page 18

• Manufacturer Part Number: AT45DB161-CI
• Description: IC FLASH 16MBIT 20MHZ 24CBGA
• Manufacturer: Atmel

Specifications of AT45DB161-CI

• Format - Memory: FLASH
• Memory Type: DataFLASH
• Memory Size: 16M (4096 pages x 528 bytes)
• Speed: 20MHz
• Interface: SPI, 3-Wire Serial
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 24-CBGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Figure 2. Algorithm for Randomly Modifying Data
Notes:
Sector Addressing
18
1. To preserve data integrity, each page of a DataFlash sector (256 pages per sector) must be updated/rewritten at least once
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
PA11
0
0
0
1
1
1
•
•
•
within every 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 256 pages of the sector. See application
note AN-4 (“Using Atmel’s Serial DataFlash”) for more details.
AT45DB161
MAIN MEMORY PAGE PROGRAM
PA10
0
0
0
1
1
1
•
•
•
(82H, 85H)
to BUFFER TRANSFER
ADDRESS POINTER
MAIN MEMORY PAGE
Auto Page Rewrite
INCREMENT PAGE
PA9
(53H, 55H)
(58H, 59H)
START
0
0
1
0
1
1
•
•
•
END
provide address of
page to modify
MEMORY PAGE PROGRAM
(2)
(2)
BUFFER to MAIN
BUFFER WRITE
(84H, 87H)
(83H, 86H)
If planning to modify multiple
bytes currently stored within
a page of the Flash array
PA8
0
1
0
1
0
1
•
•
•
Sector
13
14
15
0
1
2
•
•
•