JS28F256P33BFE datasheet(64/90 Pages) MICRON

64 / 90 page

P33-65nm

Datasheet

Aug 2009

Order Number: 320003-08

A.1.4

Device Geometry Definition

Table 33: Device Geometry Definition

Offset

Length

Description

Add

Hex

Code

Value

27h

“n” such that device size = 2n in number of bytes

27:

See Table Below

28h

Flash device interface code assignment:

"n" such that n+1 specifies the bit field that represents the flash device width

capabilities as described in the table:

765

432

x64

x32

x16

28:

--01

x16

___

29:

--00

2Ah

“n” such that maximum number of bytes in write buffer = 2n

2A:

--0A

1024

2B:

--00

2Ch

Number of erase block regions (x) within device:

1. x = 0 means no erase blocking; the device erases in bulk

2. x specifies the number of device regions with one or more contiguous

same-size erase blocks.

3. Symmetrically blocked partitions have one blocking region

2C:

See Table Below

Erase Block Region 1 Information

bits 0-15 = y, y+1 = number of identical-size erase blocks

bits 16-31 = z, region erase block(s) size are z x 256 bytes

2D:

See Table Below

2E:

2F:

30:

31h

Erase Block Region 2 Information

bits 0-15 = y, y+1 = number of identical-size erase blocks

bits 16-31 = z, region erase block(s) size are z x 256 bytes

31:

See Table Below

32:

33:

34:

35h

Reserved for future erase block region information

35:

See Table Below

36:

37:

38:

Address

256-Mbit

Address

256-Mbit

Address

256-Mbit

-B

-T

-B

-T

-B

-T

27:

--19

2D:

--03

--FE

33:

--00

--80

28:

--01

2E:

--00

34:

--02

--00

29:

--00

2F:

--80

--00

35:

--00

2A:

--0A

30:

--00

--02

36:

--00

2B:

--00

31:

--FE

--03

37:

--00

2C:

--02

32:

--00

38:

--00

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