The MT28F322P3 is a high-performance, high-
density, nonvolatile memory solution that can
significantly improve system performance. This new
architecture features a two-memory-bank configura-
tion that supports background operation with no
A high-performance bus interface allows a fast page
mode data transfer; a conventional asynchronous bus
interface is provided as well.
The MT28F322P3 allows soft protection for blocks,
as read only, by configuring soft protection registers
with dedicated command sequences. For security pur-
poses, two 64-bit chip protection registers are provided.
The embedded WORD WRITE and BLOCK ERASE
functions are fully automated by an on-chip write state
machine (WSM). Two on-chip status registers, one for
each of the two memory partitions, can be used to moni-
tor the WSM status and to determine the progress of
the program/erase task.
The erase/program suspend functionality allows
compatibility with existing EEPROM emulation soft-
The device is manufactured using 0.18µm process
Please refer to Micron’s Web site (www.micron.com/
flash) for the latest data sheet.
2 MEG x 16
ASYNC/PAGE FLASH MEMORY
ARCHITECTURE AND MEMORY
The MT28F322P3 Flash device contains two sepa-
rate banks of memory (bank a and bank b) for simulta-
neous READ and WRITE operations.
The MT28F322P3 Flash memory is available in the
following bank segmentation configuration:
• Bank a comprises one-fourth of the memory
and contains 8 x 4K-word parameter blocks
and 15 x 32K-word blocks.
• Bank b represents three-fourths of the
memory, is equally sectored, and contains
48 x 32K-word blocks.
Figures 2 and 3 show the bottom and top memory
Due to the size of the package, Micron’s standard
part number is not printed on the top of each device.
Instead, an abbreviated device mark comprised of a
five-digit alphanumeric code is used. The abbreviated
device marks are cross referenced to Micron part num-
bers in Table 1.
Cross Reference for Abbreviated Device Marks
2 Meg x 16 Async/Page Flash Memory
MT28F322P3FJ_3.p65 – Rev. 3, Pub. 7/02
2 Micron Technology, Inc., reserves the right to change products or specifications without notice.
©2002, Micron Technology, Inc.