Rainbow Electronics AT25DQ321 - Manual (Page 6)

6 AT25DQ321 [DATASHEET]
8718D–DFLASH–12/2012
4. Memory Array
To provide the greatest flexibility, the memory array of the AT25DQ321 can be erased in four levels of granularity
including a Full Chip Erase. In addition, the array has been divided into physical sectors of uniform size, of which each
sector can be individually protected from program and erase operations. The size of the physical sectors is optimized for
both code and data storage applications, allowing both code and data segments to reside in their own isolated regions.
The Memory Architecture Diagram illustrates the breakdown of each erase level as well as the breakdown of each
physical sector.
Figure 4-1. Memory Architecture Diagram
4KB 3FFFFFh – 3FF000h 256 bytes 3FFFFFh – 3FFF00h
4KB 3FEFFFh – 3FE000h 256 bytes 3FFEFFh – 3FFE00h
4KB 3FDFFFh – 3FD000h 256 bytes 3FFDFFh – 3FFD00h
4KB 3FCFFFh – 3FC000h 256 bytes 3FFCFFh – 3FFC00h
4KB 3FBFFFh – 3FB000h 256 bytes 3FFBFFh – 3FFB00h
4KB 3FAFFFh – 3FA000h 256 bytes 3FFAFFh – 3FFA00h
4KB 3F9FFFh – 3F9000h 256 bytes 3FF9FFh – 3FF900h
4KB 3F8FFFh – 3F8000h 256 bytes 3FF8FFh – 3FF800h
4KB 3F7FFFh – 3F7000h 256 bytes 3FF7FFh – 3FF700h
4KB 3F6FFFh – 3F6000h 256 bytes 3FF6FFh – 3FF600h
4KB 3F5FFFh – 3F5000h 256 bytes 3FF5FFh – 3FF500h
4KB 3F4FFFh – 3F4000h 256 bytes 3FF4FFh – 3FF400h
4KB 3F3FFFh – 3F3000h 256 bytes 3FF3FFh – 3FF300h
4KB 3F2FFFh – 3F2000h 256 bytes 3FF2FFh – 3FF200h
4KB 3F1FFFh – 3F1000h 256 bytes 3FF1FFh – 3FF100h
4KB 3F0FFFh – 3F0000h 256 bytes 3FF0FFh – 3FF000h
4KB 3EFFFFh – 3EF000h 256 bytes 3FEFFFh – 3FEF00h
4KB 3EEFFFh – 3EE000h 256 bytes 3FEEFFh – 3FEE00h
4KB 3EDFFFh – 3ED000h 256 bytes 3FEDFFh – 3FED00h
4KB 3ECFFFh – 3EC000h 256 bytes 3FECFFh – 3FEC00h
4KB 3EBFFFh – 3EB000h 256 bytes 3FEBFFh – 3FEB00h
4KB 3EAFFFh – 3EA000h 256 bytes 3FEAFFh – 3FEA00h
4KB 3E9FFFh – 3E9000h 256 bytes 3FE9FFh – 3FE900h
4KB 3E8FFFh – 3E8000h 256 bytes 3FE8FFh – 3FE800h
4KB 3E7FFFh – 3E7000h
4KB 3E6FFFh – 3E6000h
4KB 3E5FFFh – 3E5000h
4KB 3E4FFFh – 3E4000h 256 bytes 0017FFh – 001700h
4KB 3E3FFFh – 3E3000h 256 bytes 0016FFh – 001600h
4KB 3E2FFFh – 3E2000h 256 bytes 0015FFh – 001500h
4KB 3E1FFFh – 3E1000h 256 bytes 0014FFh – 001400h
4KB 3E0FFFh – 3E0000h 256 bytes 0013FFh – 001300h
256 bytes 0012FFh – 001200h
256 bytes 0011FFh – 001100h
256 bytes 0010FFh – 001000h
4KB 00FFFFh – 00F000h 256 bytes 000FFFh – 000F00h
4KB 00EFFFh – 00E000h 256 bytes 000EFFh – 000E00h
4KB 00DFFFh – 00D000h 256 bytes 000DFFh – 000D00h
4KB 00CFFFh – 00C000h 256 bytes 000CFFh – 000C00h
4KB 00BFFFh – 00B000h 256 bytes 000BFFh – 000B00h
4KB 00AFFFh – 00A000h 256 bytes 000AFFh – 000A00h
4KB 009FFFh – 009000h 256 bytes 0009FFh – 000900h
4KB 008FFFh – 008000h 256 bytes 0008FFh – 000800h
4KB 007FFFh – 007000h 256 bytes 0007FFh – 000700h
4KB 006FFFh – 006000h 256 bytes 0006FFh – 000600h
4KB 005FFFh – 005000h 256 bytes 0005FFh – 000500h
4KB 004FFFh – 004000h 256 bytes 0004FFh – 000400h
4KB 003FFFh – 003000h 256 bytes 0003FFh – 000300h
4KB 002FFFh – 002000h 256 bytes 0002FFh – 000200h
4KB 001FFFh – 001000h 256 bytes 0001FFh – 000100h
4KB 000FFFh – 000000h 256 bytes 0000FFh – 000000h
64KB
(Sector 62)
64KB
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•
•
64KB
32KB
32KB
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•
•
•
•
•
•
•
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64KB
64KB
(Sector 63)
32KB
32KB
64KB
(Sector 0)
32KB
32KB
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•
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Internal Sectoring for 64KB 32KB 4KB 1-256 Byte
Sector Protection Block Erase Block Erase Block Erase Page Program
Function (D8h Command) (52h Command) (20h Command) (02h Command)
Block Erase Detail Page Program Detail
Page Address Block Address
Range Range