28F128 datasheet(23/58 Pages) INTEL

23 / 58 page

28F128J3A, 28F640J3A, 28F320J3A

Preliminary

4.2.6

Device Geometry Definition

This field provides critical details of the flash device geometry.

Device Geometry Definition

Table 11. Device Geometry Definition

Offset

Length

Description

Code See Table

Below

27h

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

27:

28h

Flash device interface: x8 async x16 async x8/x16 async

28:

--02

x8/

x16

28:00,29:00 28:01,29:00 28:02,29:00

29:

--00

2Ah

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

2A:

--05

2B:

--00

2Ch

Number of erase block regions within device:

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

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

more contiguous same-size erase blocks

3. Symmetrically blocked partitions have one blocking region

4. Partition size = (total blocks) x (individual block size)

2C:

--01

2Dh

Erase Block Region 1 Information

2D:

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

2E:

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

2F:

30:

Address

32 Mbit

64 Mbit

128 Mbit

27:

--16

--17

--18

28:

--02

29:

--00

2A:

--05

2B:

--00

2C:

--01

2D:

--1F

--3F

--7F

2E:

--00

2F:

--00

30:

--02

28F128 Datasheet(PDF) 23 Page - Intel Corporation

28F128 Datasheet(HTML) 23 Page - Intel Corporation

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