N28F001BXT150 Intel, N28F001BXT150 Datasheet - Page 5

• Manufacturer Part Number: N28F001BXT150
• Manufacturer: Intel

Specifications of N28F001BXT150

• Density: 1Mb
• Access Time (max): 150ns
• Interface Type: Parallel
• Boot Type: Top
• Address Bus: 17b
• Operating Supply Voltage (typ): 5V
• Operating Temp Range: 0C to 70C
• Package Type: PLCC
• Program/erase Volt (typ): 11.4 to 12.6V
• Sync/async: Asynchronous
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Word Size: 8b
• Number Of Words: 128K
• Supply Current: 30mA
• Mounting: Surface Mount
• Pin Count: 32
• Lead Free Status / Rohs Status: Not Compliant

1.0 APPLICATIONS
The Intel
augments the nonvolatility, in-system electrical
erasure and reprogrammability of Intel’s flash
memory by offering four separately erasable
blocks and integrating a state machine to control
erase and program functions. The specialized
blocking architecture and automated programming
of the 28F001BX provide a full-function, non-
volatile flash memory ideal for a wide range of
applications, including PC boot/BIOS memory,
minimum-chip embedded program memory and
parametric data storage. The 28F001BX combines
the safety of a hardware-protected 8-Kbyte boot
block with the flexibility of three separately
reprogrammable blocks (two 4-Kbyte parameter
blocks and one 112-Kbyte code block) into one
versatile, cost-effective flash memory. Additionally,
reprogramming one block does not affect code
stored in another block, ensuring data integrity.
The flexibility of flash memory reduces costs
throughout the life cycle of a design. During the
early stages of a system’s life, flash memory
reduces prototype development and testing time,
allowing the system designer to modify in-system
software electrically versus manual removal of
components. During production, flash memory
provides
configuration, reducing system inventory and
eliminating unnecessary handling and less reliable
socketed connections. Late in the life cycle, when
software updates or code “bugs” are often
unpredictable and costly, flash memory reduces
update costs by allowing the manufacturers to
send
Alternatively,
communication link are possible at speeds up to
9600
programming time.
Reprogrammable environments, such as the
personal computer, are ideal applications for the
28F001BX. The internal state machine provides
SRAM-like timings for program and erasure, using
the command and status registers. The blocking
scheme allows BIOS update in the main and
floppy
baud
®
28F001BX Flash Boot Block memory
flexible
due
updates
remote
firmware
to
versus
flash
updates
for
memory’s
a
just-in-time
technician.
over
fast
a
parameter blocks, while still providing recovery
code in the boot block in the unlikely event a
power failure occurs during an update, or where
BIOS code is corrupted. Parameter blocks also
provide convenient configuration storage, backing
up SRAM and battery configurations. EISA
systems,
configurations in a flash parameter block, reducing
system SRAM.
Laptop BIOS are becoming increasingly complex
with the addition of power management software
and extended system setup screens. BIOS code
complexity increases the potential for code
updates after the sale, but the compactness of
laptop designs makes hardware updates very
costly. Boot block flash memory provides an
inexpensive update solution for laptops, while
reducing laptop obsolescence. For portable PCs
and hand-held equipment, the deep power-down
mode
requirements during periods of slow operation or
sleep modes.
The 28F001BX gives the embedded system
designer several desired features. The internal
state machine reduces the size of external code
dedicated to the erase and program algorithms, as
well
microprocessor to respond to other system
requests during program and erasure. The four
blocks allow logical segmentation of the entire
embedded software: the 8-Kbyte block for the boot
code, the 112-Kbyte block for the main program
code and the two 4-Kbyte blocks for updatable
parametric data storage, diagnostic messages and
data, or extensions of either the boot code or
program code. The boot block is hardware
protected against unauthorized write or erase of its
vital code in the field. Further, the power-down
mode also locks out erase or write operations,
providing absolute data protection during system
power-up or power loss. This hardware protection
provides obvious advantages for safety related
applications such as transportation, military, and
medical. The 28F001BX is well suited for
minimum-chip embedded applications ranging
from communications to automotive.
as
dramatically
for
freeing
example,
the
lowers
can
microcontroller
store
system
28F001BX
hardware
power
or
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