Rainbow Electronics AT45DQ161 - Manual (Page 6)

6 AT45DQ161 [ADVANCE DATASHEET]
8790A–DFLASH–11/2012
3. Memory Array
To provide optimal flexibility, the AT45DQ161 memory array is divided into three levels of granularity comprising of
sectors, blocks, and pages. Figure 3-1, Memory Architecture Diagram illustrates the breakdown of each level and
details the number of pages per sector and block. Program operations to the DataFlash can be done at the full page level
or at the byte level (a variable number of bytes). The erase operations can be performed at the chip, sector, block, or
page level.
Figure 3-1. Memory Architecture Diagram
Sector 0a = 8 pages
4,096/4,224 bytes
Sector 0b = 248 pages
126,976/130,944 bytes
Block = 4,096/4,224 bytes
8 Pages Sector 0a
Sector 0b
Page = 512/528 bytes
Page 0
Page 1
Page 6
Page 7
Page 8
Page 9
Page 4,094
Page 4,095
Block 0
Page 14
Page 15
Page 16
Page 17
Page 18
Block 1
Sector Architecture Block Architecture Page Architecture
Block 0
Block 1
Block 30
Block 31
Block 32
Block 33
Block 510
Block 511
Block 62
Block 63
Block 64
Block 65
Sector 1
Sector 2 Sector 15 = 256 pages
131,072/135,168 bytes
Block 2
Sector 1 = 256 pages
131,072 /135,168 bytes
Sector 14 = 256 pages
131,072/135,168 bytes
Sector 2 = 256 pages
131,072/135,168 bytes