PA28F400BVB120 Intel, PA28F400BVB120 Datasheet - Page 7

• Manufacturer Part Number: PA28F400BVB120
• Manufacturer: Intel

Specifications of PA28F400BVB120

• Density: 4Mb
• Access Time (max): 120ns
• Interface Type: Parallel
• Boot Type: Bottom
• Address Bus: 19/18Bit
• Operating Supply Voltage (typ): 3.3/5V
• Operating Temp Range: 0C to 70C
• Package Type: SOP
• Sync/async: Asynchronous
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (min): 3/4.5V
• Operating Supply Voltage (max): 3.6/5.5V
• Word Size: 8/16Bit
• Number Of Words: 512K/256K
• Supply Current: 65mA
• Mounting: Surface Mount
• Pin Count: 44
• Lead Free Status / Rohs Status: Not Compliant

1.3
The 4-Mbit boot block flash memory family
combines
performance, cost-effective flash memories with
blocking and hardware protection capabilities. Their
flexibility and versatility reduce costs throughout the
product life cycle. Flash memory is ideal for Just-In-
Time production flow, reducing system inventory
and costs, and eliminating component handling
during the production phase.
When your product is in the end-user’s hands, and
updates
necessary, flash memory reduces the update costs
by allowing user-performed code changes instead
of costly product returns or technician calls.
The 4-Mbit boot block flash memory family provides
full-function, blocked flash memories suitable for a
wide range of applications. These applications
include
applications storage, digital cellular phone program
and data storage, telecommunication boot/firmware,
printer firmware/font storage and various other
embedded applications where program and data
storage are required.
Reprogrammable
computers, are ideal applications for the 4-Mbit
flash
sophistication greatens the probability that a code
update will be required after the PC is shipped. For
example, the emerging of “plug and play” standard
in desktop and portable PCs enables auto-
configuration of ISA and PCI add-in cards.
However, since the plug and play specification
continues to evolve, a flash BIOS provides a cost-
effective capability to update existing PCs. In
addition, the parameter blocks are ideal for storing
the
allowing you to integrate the BIOS PROM and
parameter
component, reducing parts costs while increasing
functionality.
SEE NEW DESIGN RECOMMENDATIONS
required
memory
Applications
extended
or
storage
high-density,
feature
products.
auto-configuration
systems,
PC
EEPROM
enhancements
BIOS
Increasing
such
low-power,
and
into
as
parameters,
ROM-able
a
personal
software
become
single
high-
4-MBIT SmartVoltage BOOT BLOCK FAMILY
The 4-Mbit flash memory products are also
excellent design solutions for digital cellular phone
and
requiring very low power consumption, high-
performance,
modular software designs, and a small form factor
package. The 4-Mbit’s blocking scheme allows for
easy segmentation of the embedded code with
16 Kbytes of hardware-protected boot code, four
main blocks of program code and two parameter
blocks of 8 Kbytes each for frequently updated data
storage and diagnostic messages (e.g., phone
numbers, authorization codes).
Intel’s boot block architecture provides a flexible
voltage solution for the different design needs of
various applications. The asymmetrically-blocked
memory map allows the integration of several
memory components into a single flash device. The
boot block provides a secure boot PROM; the
parameter
functionality for parameter store with proper
software techniques; and the main blocks provide
code and data storage with access times fast
enough to execute code in place, decreasing RAM
requirements.
1.4
Intel’s
provides upgrade paths in every package pinout to
the 8-Mbit density. The 28F004B 40-lead TSOP
pinout for space-constrained designs is shown in
Figure 3. The 28F400 44-lead PSOP pinout follows
the industry-standard ROM/EPROM pinout, as
shown in Figure 4. For designs that require x16
operation but have space concerns, refer to the
48-lead pinout in Figure 5. Furthermore, the 28F400
56-lead TSOP pinout shown in Figure 6 provides
density upgrades to future higher density boot block
memories.
Pinouts for the corresponding 2-Mbit and 8-Mbit
components are also provided for convenient
reference. 4-Mbit pinouts are given on the chip
illustration in the center, with 2-Mbit and 8-Mbit
pinouts going outward from the center.
telecommunication
SmartVoltage
Pinouts
blocks
high-density
can
Boot
switching
emulate
storage
Block
applications
architecture
capability,
EEPROM
7